Button event handler Released() does not trigger

[wncnho18]

Description
The event does not fire when releasing button.
Subscribing to clicked does work.

Steps to Reproduce
Create a XP page with a button and subscribe to the respective
event to execute a piece of code.
Create a GTK backend project / Add respective nugets.
Run the GTK project.
nothing happens.

Basic Information
Version with issue: 4.3.0.991221
Last known good version: n/a