@SViel Being this is a true relay my thought is that the small amount time the relay is in action it will allow power held in the bypass to keep the switch from crashing. I don’t know for sure it will, again just a thought.
I had a similar issue, but it happened way more frequently than once a day. It was like every hour. What it was for me was my zigbee network was completely maxed out. I was up around 200 devices on one network, and the last switch added was constantly power cycling. I ended up splitting my zigbee network up and it’s been solid since.
Just a though, maybe try resetting a switch and leave it off the network completely and see if it keeps happening as a regular dumb switch?
Haven’t had a single ZigBee network crash since I’ve removed it. Will add it to a different network soon in preparation for updating its firmware, so will also be able to see if it crashes when it’s on its own…