MQTT does not start up properly (sometimes) #115958
Description
The problem
When restarting HA (to apply new settings, updates, etc.) I have a fair chance that MQTT is seemingly starting up properly - but missing certain functionalities.
Most prominently, button events are not registered, even though they are clearly visible in Zigbee2MQTT.
The usual workaround: Restarting MQTT until it works again.
Sometimes it works after restarting once, sometimes it need 2 or more restarts until all events are registered again.
In the logfile I cannot find anything remotely related. The events seem to just "vanish" silently.
What version of Home Assistant Core has the issue?
core-2024.4.3
What was the last working version of Home Assistant Core?
core-2024.1 (maybe)
What type of installation are you running?
Home Assistant OS
Integration causing the issue
MQTT
Link to integration documentation on our website
No response
Diagnostics information
No response
Example YAML snippet
No response
Anything in the logs that might be useful for us?
nothing I can remotely pin point to the issueAdditional information
This issue is fairly new. It probably started in Release 2024.3 or so.