Hi OpenHab,
Could we please consider the same change as it was done for Lock accessory here ([OpenHab 3.0.1] - Invert Locks - HomeKit) for ContactSensor type as well.
I have dry contacts which indicate open/closed and in this case ON (True) indicates that item is closed and OFF (False) that item is opened.
Unfortunately was not able to configure it properly. OH latest stable v3
Thanks