I have had a HA Yellow running for quite some time, and it is mostly fine, i also have a bunch of Zigbee devices running on ZHA, recently (for no apparent reason, no changes in devices or HA) disconnected, both Aqara. I guessed they where out of battery, so i put in new with no luck, so i repaired them and both of them worked fine for a while. One of them (single button) still works with no issues, the other one however (door sensor) disappears after a couple of hours inactive, if i repair it its the same, works fine until aprox 2 hours inactive and it disappears.
The only thing they have in common is that are batterypowered Aqara Zigbee devices and that they are located in the same area.
There have not been any changes in anything i can imagine would interfere with the network either.
Any ideas?