Fibaro Dimmer turns off and on again every 10'07"

It really happens every 10 minutes and 6 or 7 seconds. No more, no less than that.
I see one event with description “Device responding again” every time this happens.
Any idea why?
I read somewhere about possible overheating forcing the dimmer to reset, but doesn’t seem to be the case. It wouldn’t be in such sharp intervals and the dimmer doesn’t seem to be overheated when I touch it.

Does this only happen, if the dimmer is coupled to openHAB? If not, maybe the dimmer is bricked…

I will check this later when I’m back home. In the meantime, after the several diagnostics I was trying to do yesterday - involved removing and switch and adding it again - it stopped doing it for the last 10 hours.