Just been through the pain of moving from ZHA to Z2M, and all devices were recognised, paired and working in Z2M and as HA devices.
Two days later, the HA devices appear no longer valid in HA, but all Z2M devices still work from the Z2M web interface, so MQTT is alive and well as are the devices and the SLZB-MR3.
Any idea why the devices are no longer valid in HA or how they can be recreated?
You didn’t give much to go on, so I’m assuming you didn’t touch the Z2M settings in the past 2 days. If so, check the MQTT logs for both the addon & the Integration.
Did you turn off ZHA and disconnect it from grabbing the Dongle?
Sounds to me like you restarted HA and ZHA grabbed the coordinator first. If it’s installed and has access, it will grab it first.