Unable to set config value for motion sensor

[nelbs]

I have some Neo coolcam PIR PD02Z sensors and are unable to change parameter 99 (ambient light intensity calibration) . In the OZW gui I cant fill in / change a number at the entry of parameter 99. See screenshots below.

The strange thing is that the initial value is 1000. When I click on that value to change it, it changes automatically to 1. After that I cant change it anymore. I can confirm that the value is indeed changed as the sensor now reports unrealistic lux values.

I looked into the XML and compared parameter 5, which i can change, and parameter 99, which i cannot. the only difference is that "units" is missing at parameter 99 and that the max and min values differ. Could this be causing the problem.

<Value type="short" genre="config" instance="1" index="5" label="Ambient Illumination Lux Level" units="lux" value="100" min="0" max="1000" size="2">

<Value type="short" genre="config" instance="1" index="99" label="Ambient Light Intensity Calibration" value="1000" min="1" max="65536" size="2">