My Zigbee is also completely broken on the latest Update.
Zigbee2mqtt is not working anymore. Updated Multiprotocol addon to 2.4 (latest) when HA 2024.1 came out and one of those things killed it for me.
Strangely…now with the latest multiprotocol addon and Z2MQTT the addon rubs again…but all my lights are “Offline”. The crazy thing is…the switches (battery powered) and IKEA air quality thingy are connected just fine. This is so weird.
I updated mine to 2024.1.2, ZHA works great as it was on 2023.12.4, but my Zigbee2MQTT just went crazy, all of my devices went missing, tried to import from a backup, rebooted my HA, coordinators, APs and all of my network, nothing, the logs were clear, it reported my sensors, but in HA and in the Zigbee2MQTT WebUI none of my devices were there or available, had to roll back to 2024.1.0, and everything was working again even my ZHA.
Could not figure it out why this happened. 2024.1.x is not being a happy release with my setup…
For context my Zigbee2MQTT Coordinator is a Sonoff Zigbee with tasmota, and my ZHA is a Lidl Silvercrest.