diff --git a/package-lock.json b/package-lock.json
index 71fe6e8..0f2f6ad 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9275,6 +9275,11 @@
       "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.20.tgz",
       "integrity": "sha512-PlhdFcillOINfeV7Ni6oF1TAEayyZBoZ8bcshTHqOYJYlrqzRK5hagpagky5o4HfCzzd1TRkXPMFq6cKk9rGmA=="
     },
+    "lodash-es": {
+      "version": "4.17.21",
+      "resolved": "https://registry.npmjs.org/lodash-es/-/lodash-es-4.17.21.tgz",
+      "integrity": "sha512-mKnC+QJ9pWVzv+C4/U3rRsHapFfHvQFoFB92e52xeyGMcX6/OlIl78je1u8vePzYZSkkogMPJ2yjxxsb89cxyw=="
+    },
     "lodash._reinterpolate": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/lodash._reinterpolate/-/lodash._reinterpolate-3.0.0.tgz",
diff --git a/package.json b/package.json
index 2e3e8fd..47e8816 100644
--- a/package.json
+++ b/package.json
@@ -18,6 +18,7 @@
     "@testing-library/react": "^9.5.0",
     "@testing-library/user-event": "^7.2.1",
     "fast-sort": "^1.5.6",
+    "lodash-es": "^4.17.21",
     "node-sass": "^4.13.1",
     "react-app-polyfill": "^1.0.6",
     "react-ga": "^2.7.0",
diff --git a/src/lib/components/App.js b/src/lib/components/App.js
index 63adb0f..b792006 100644
--- a/src/lib/components/App.js
+++ b/src/lib/components/App.js
@@ -3,6 +3,7 @@ import ReactGA from 'react-ga';
 import sort from 'fast-sort';
 import runtimeEnv from '@mars/heroku-js-runtime-env';
 import { forceCheck } from 'react-lazyload';
+import * as _ from 'lodash';
 
 import BetaBanner from "./BetaBanner";
 import Splash from "./Splash";
@@ -25,15 +26,16 @@ const Footer = lazy(() => import('./Footer'));
 export default class App extends React.Component {
 
   state = {
-    /** Array of visible feature points in maps and lists. (visibleFeatures) */
+    /** Array of all artwork objects that may show in maps and lists. */
     allFeatures: [],
-    visFtrs: [],
+    /** Array of visible artwork IDs in maps and lists. */
+    visibleFeatureIds: [],
     /** The type of view.
      * Options: list, detail, map, filter
      * Last two only display differently on mobile. */
     viewType: "map",
-    /** Full object representing active artwork. */
-    activeFeature: null,
+    /** Integer representing active artwork ID. */
+    activeFeatureId: null,
     /** Keep track of whether any filters are applied. */
     isFiltered: false,
     /** Array of year OptionTypes to filter features by. */
@@ -74,11 +76,11 @@ export default class App extends React.Component {
     fetch(this.props.featuresDataSource)
       .then(response => response.json())
       .then(json => {
-        const visFtrs = json.features.map(f => {
+        const allFeatures = json.features.map(f => {
           if (!isArtwork(f)) return null
           return f
         }).filter(Boolean)
-        this.setState({ allFeatures: visFtrs, visFtrs  },
+        this.setState({ allFeatures, visibleFeatureIds: allFeatures.map(f => f.id)  },
           // Sort after first load.
           () => { this.sortList() }
         );
@@ -103,9 +105,9 @@ export default class App extends React.Component {
     })
   }
 
-  setVisibleFeatures = (visFtrs) => {
+  setVisibleFeatureIds = (visibleFeatureIds) => {
     this.setState(
-      {visFtrs: visFtrs},
+      { visibleFeatureIds },
       () => { this.sortList() }
     );
   }
@@ -152,7 +154,7 @@ export default class App extends React.Component {
       return keepForYear && keepForWard && keepForProgram;
     })
 
-    this.setVisibleFeatures(visibleFeatures);
+    this.setVisibleFeatureIds(visibleFeatures.map(f => f.id));
   }
 
   handleSelectYears = (selectedOptions) => {
@@ -212,47 +214,47 @@ export default class App extends React.Component {
     switch(this.state.sortType) {
       case 'artist-asc':
       default:
-        sortedList = sort(this.state.visFtrs).asc(u => u.properties.title ? u.properties.title.toLowerCase() : u.properties.title)
+        sortedList = sort(this.state.visibleFeatureIds).asc(id => _.find(this.state.allFeatures, { id }).properties?.title.toLowerCase())
         break
       case 'artist-desc':
-        sortedList = sort(this.state.visFtrs).desc(u => u.properties.title ? u.properties.title.toLowerCase() : u.properties.title)
+        sortedList = sort(this.state.visibleFeatureIds).desc(id => _.find(this.state.allFeatures, { id }).properties?.title.toLowerCase())
         break
       case 'year-asc':
-        sortedList = sort(this.state.visFtrs).asc(u => u.properties.year)
+        sortedList = sort(this.state.visibleFeatureIds).asc(id => _.find(this.state.allFeatures, { id }).properties?.year)
         break
       case 'year-desc':
-        sortedList = sort(this.state.visFtrs).desc(u => u.properties.year)
+        sortedList = sort(this.state.visibleFeatureIds).desc(id => _.find(this.state.allFeatures, { id }).properties?.year)
         break
     }
-    this.setState({visFtrs: sortedList})
+    this.setState({ visibleFeatureIds: sortedList })
   }
 
-  handleMapClick = (feature) => {
+  handleMapClick = (featureId) => {
     ReactGA.event({
       category: 'Map',
       action: 'Clicked feature',
       label: 'ward or artwork',
     })
-    this.setActiveFeature(feature)
+    this.setActiveFeatureId(featureId)
   }
 
 
-  setActiveFeature = (feature) => {
+  setActiveFeatureId = (featureId) => {
     this.setState({
-      activeFeature: feature,
+      activeFeatureId: featureId,
     });
   }
 
 
   handleCloseFeature = () => {
-    const uid = this.state.activeFeature.properties.uid
+    const uid = this.state.allFeatures[this.state.activeFeatureId].properties.uid
     if (typeof(document) !== 'undefined') {
       const featureBtn = document.getElementById(uid)
       featureBtn.scrollIntoView()
       featureBtn.focus()
     }
     this.setState({
-      activeFeature: null
+      activeFeatureId: null
     })
   }
 
@@ -275,14 +277,17 @@ export default class App extends React.Component {
   render() {
     const {
       showSplash,
-      visFtrs,
-      activeFeature,
+      allFeatures,
+      visibleFeatureIds,
+      activeFeatureId,
       isMobileView,
       isFiltered,
       viewType,
       showWardLayer,
     } = this.state;
 
+    const activeFeature = _.find(allFeatures, { id: activeFeatureId })
+
     return (
       <div className="parent" id="start-map">
         <BetaBanner isMobile={isMobileView}/>
@@ -299,8 +304,9 @@ export default class App extends React.Component {
                 <Suspense fallback={<div className="loading" />}>
                   <FeatureList
                     isMobile={isMobileView}
-                    features={visFtrs}
-                    onItemClick={this.setActiveFeature}
+                    allFeatures={allFeatures}
+                    featureIds={visibleFeatureIds}
+                    onItemClick={this.setActiveFeatureId}
                     activeFeature={activeFeature}
                   />
                   <FeatureDetail feature={activeFeature} onClose={this.handleCloseFeature} />
@@ -319,8 +325,9 @@ export default class App extends React.Component {
                       />
                       <FeatureList
                         isMobile={isMobileView}
-                        features={visFtrs}
-                        onItemClick={this.setActiveFeature}
+                        allFeatures={allFeatures}
+                        featureIds={visibleFeatureIds}
+                        onItemClick={this.setActiveFeatureId}
                         activeFeature={activeFeature}
                       />
                       <FeatureDetail feature={activeFeature} onClose={this.handleCloseFeature} />
@@ -331,7 +338,8 @@ export default class App extends React.Component {
               <InteractiveMap
                 isMobile={isMobileView}
                 onFeatureMapClick={this.handleMapClick}
-                features={visFtrs}
+                allFeatures={allFeatures}
+                visibleFeatureIds={visibleFeatureIds}
                 activeFeature={activeFeature}
                 showWardLayer={showWardLayer}
                 googleApiKey={this.props.googleApiKey}
diff --git a/src/lib/components/FeatureList.js b/src/lib/components/FeatureList.js
index c43e2f2..974ba79 100644
--- a/src/lib/components/FeatureList.js
+++ b/src/lib/components/FeatureList.js
@@ -1,27 +1,29 @@
 import React, { useEffect } from 'react';
 import PropTypes from "prop-types";
 import { forceCheck } from 'react-lazyload';
+import * as _ from 'lodash';
 import FeatureListItem from './FeatureListItem';
 
 
-const FeatureList = ({ features, onItemClick, isMobile, activeFeature }) => {
+const FeatureList = ({ allFeatures = [], featureIds = [], onItemClick, isMobile, activeFeature }) => {
   useEffect(() => {
     forceCheck()
   });
 
   return (
     <div id="results" className="list-container" role="region" aria-live="polite">
-      <p className="text-right">{features.length} Results</p>
+      <p className="text-right">{featureIds.length} Results</p>
       <ul id="list">
-        {features.map(feature =>
-          <FeatureListItem
+        {featureIds.map(id => {
+          const feature = _.find(allFeatures, { id })
+          return <FeatureListItem
             key={feature.properties.uid}
             feature={feature}
             onClick={onItemClick}
             isMobile={isMobile}
             activeFeature={activeFeature}
           />
-        )}
+        })}
       </ul>
     </div>
   );
@@ -29,8 +31,8 @@ const FeatureList = ({ features, onItemClick, isMobile, activeFeature }) => {
 
 
 FeatureListItem.propTypes = {
-  features: PropTypes.arrayOf(PropTypes.object),
+  featureIds: PropTypes.arrayOf(PropTypes.number),
   onItemClick: PropTypes.func,
 }
 
-export default FeatureList
\ No newline at end of file
+export default FeatureList
diff --git a/src/lib/components/FeatureListItem.js b/src/lib/components/FeatureListItem.js
index baca9a0..83dc99a 100644
--- a/src/lib/components/FeatureListItem.js
+++ b/src/lib/components/FeatureListItem.js
@@ -16,7 +16,7 @@ const FeatureListItem = ({ feature, onClick, isMobile, activeFeature }) => {
       value: uid,
     })
 
-    onClick(feature)
+    onClick(feature.id)
   }
 
   const handleKeyPress = (event) => {
@@ -84,4 +84,4 @@ FeatureListItem.defaultProps = {
   media: [],
 }
 
-export default FeatureListItem
\ No newline at end of file
+export default FeatureListItem
diff --git a/src/lib/components/InteractiveMap.js b/src/lib/components/InteractiveMap.js
index 7022765..8762105 100644
--- a/src/lib/components/InteractiveMap.js
+++ b/src/lib/components/InteractiveMap.js
@@ -1,6 +1,7 @@
 import React, { createRef, lazy, Suspense } from 'react';
 import PropTypes from "prop-types";
 import { Map, Marker, GoogleApiWrapper } from '@nomadiclabs/google-maps-react';
+import * as _ from 'lodash';
 
 import * as constants from "../constants";
 
@@ -17,8 +18,8 @@ class InteractiveMap extends React.Component {
   constructor(props) {
     super(props)
     this.state = {
-      prevActiveFeature: {},
-      features: this.props.features,
+      allFeatures: this.props.allFeatures,
+      visibleFeatureIds: this.props.visibleFeatureIds,
       wards: {},
     }
     this.mapRef = createRef()
@@ -36,8 +37,8 @@ class InteractiveMap extends React.Component {
   }
 
   componentDidUpdate(prevProps) {
-    if (prevProps.features !== this.props.features) {
-      this.setState({ features: this.props.features })
+    if (prevProps.visibleFeatureIds !== this.props.visibleFeatureIds) {
+      this.setState({ visibleFeatureIds: this.props.visibleFeatureIds })
     }
 
     if (prevProps.showWardLayer !== this.props.showWardLayer) {
@@ -125,7 +126,7 @@ class InteractiveMap extends React.Component {
 
   render() {
     const { loaded, google, activeFeature, onFeatureMapClick } = this.props;
-    const { features } = this.state;
+    const { allFeatures, visibleFeatureIds } = this.state;
     const zoom = activeFeature ? constants.MAP_ZOOM_LEVEL.FEATURE : constants.MAP_ZOOM_LEVEL.DEFAULT
     const settings = { ...this.mapSettings, zoom }
     const center = activeFeature ? null : constants.DEFAULT_MAP_CENTER;
@@ -146,7 +147,10 @@ class InteractiveMap extends React.Component {
         >
 
           {
-            features.map((feature, i) => {
+            visibleFeatureIds.map((id) => {
+              console.log(id)
+              const feature = _.find(allFeatures, { id });
+              if (!feature) { console.log(feature) }
               const validPrograms = ["StART Support", "Partnership Program", "Outside the Box"]
               const program = validPrograms.includes(feature.properties.program) ? feature.properties.program : "Other"
               const isSelected = activeFeature && feature.properties.uid === activeFeature.properties.uid
@@ -162,7 +166,7 @@ class InteractiveMap extends React.Component {
                   key={feature.properties.uid}
                   icon={icon}
                   position={{ lng: feature.geometry.coordinates[0], lat: feature.geometry.coordinates[1] }}
-                  onClick={ () => onFeatureMapClick(feature) }
+                  onClick={ () => onFeatureMapClick(feature.id) }
                   zIndex={isSelected ? 2 : 1}
                 />
               )
diff --git a/src/lib/components/MapMarkers.js b/src/lib/components/MapMarkers.js
index a1a4559..48c4bed 100644
--- a/src/lib/components/MapMarkers.js
+++ b/src/lib/components/MapMarkers.js
@@ -67,7 +67,7 @@ const MapMarkers = ({ features, activeFeature, onFeatureMapClick }) => {
         key={feature.properties.uid}
         position={[feature.geometry.coordinates[1], feature.geometry.coordinates[0]]}
         icon={icon}
-        onClick={() => onFeatureMapClick(feature) }
+        onClick={() => onFeatureMapClick(feature.id) }
         zIndexOffset={isSelected ? 9999 : 0}
       />
     )