Conbee 2 strange behaviour

Hi all,

Since a little while I’ve been using a Conbee 2 with my Raspberry pi. I added some hue motion sensors and some Tradfri smart plugs to it and they are working perfectly. A couple of days ago I was cheking the history of one of the sensors and noticed some strange behaviour in the middle of the night. The motion sensor went from available to unavailable at random intervals between 4 and 4:30 AM. So I checked the other senors and noticed they had exactly the same behaviour. Also the smart plugs were showing this behaviour. Then I checked the history of other nights and saw exactly the same behaviour, and everytime it was between 4 and 4:30 AM. The rest of the day they don’t do this. All my other devices that are not connected to Conbee, for example my hue lights, don’t show this behaviour. Does anyone have an idea what it could be?

Thanks!