Hue motion detection not working all the time after latest update

Since I have updated the hue bridge to the current firmware as of March 10 my motion sensors are not being picked up 100% by openhab.

They work about 50% of the time. In the remaining tries I can see that motion is detected (status update of the sensor in iconnecthue) yet openhab is not switching or showing any log entries. Motion sensor „switch“ does not change in basic ui. However when motion switched manually, the lights fire properly. How can I debug this properly?
Or did anything change recently and I have to adjust my config?

I am using openhab 2.2 release. Already tried re-adding the bridge/binding.
Also added http caching as shown a tutorial here(which I believe is not better than quersing the bridge directly via item.