Neo Coolcam v1 zwave ir sensor alot of false/postive

I have 3 of these v1 pir sensors and all of them have a strange behavior.

During the daytime the pir sensor goes on/off continuously, when it goes dark this behavior stops…
I changed the settings of the device but that has no effect.

The app/driver is beta/test, there is no ‘official’ version available.
The lux sensor has no strange issue, that works normally.

I also have 3 pir v3 sensors of this brand, those work fine and have no issues…

Anyone an idea what is wrong here and how to fix?