Check the Homey Developer Tools to see how many end devices (usually battery operated, such as the aqaras) are directly connected to Homey. If that is over 15 and you do not have many zigbee router devices, you may need to add extra routers. Athom also does not advise more than about 30-40 zigbee devices in total connected to Homey without use of an additional bridge. I have 50 though, and a stable zigbee mesh.
If you still use the original Athom power adapter then try replacing it with a different one rated 2.1A or higher. Voltages of the original tend to drop below what’s needed.
You could also try the procedure to reinstall a full firmware (without loosing any data) using the procedure described here:
It may be that the firmware is somehow not completely installed.
If that does not fix it I think you should contact athom support.
