Some users reported using 70 zigbee devices on Pro 2019, but that’s quite extreme.
Pro 2023 should be able to work with 200+ zigbee devices.
When zigbee is starting to fail sometimes, it’s not Homey dying.
It’s possible your power supply unit is dying. Replace it (and it’s cable) by a well-known brand version with 5V and 2 Amperes minimum
When that doesn’t help:
Check your wifi - zigbee interference → do you have nearby neigbours with new wifi radios? Is your 2.4GHz wifi channel set to fixed? Is your zigbee channel not too close to a wifi channel?
When all’s fine, you can do this:
Start Homey in recovery mode, and start “Full software download”. It doesn’t affect your settings and all, but I’d recommend having a recent backup available.
