Random writes to KNX on restart

I’ve a quite strange behavior of openhab(ian).
According to dpkg --list | grep openhab2
openhab2 2.0.0-1 all openhab2

I’ve configured some switches + Temps for my KNX system already which are working pretty fine.
The problem comes when I restart (or update the configuration on the fly).
Openhab2 sends some random values to random KNX addresses. So some lights goes on.
Any idea what this could be?

Best regards

No idea? nobody any hint?