Did something change in HA and/or the Mosquitto MQTT addon? I can't authenticate with an HA user anymore

As the title suggests, I am no longer able to authenticate to the core_mosquitto server. It doesn’t look like the addon has been updated in the last couple of days. The only thing I think I did update was the HA OS.

I even created a new user and tried to connect via MQTT Explorer.

Am I missing something?

edit: I manually created a user inside the addon and it works. So it seems something is broken between Mosquitto and HA.

I do have exactly the same case, suddenly after upgrade of HA (superviced) the device that used to connect fails.

Yeah, I’ve sorta solved it by uninstalling/reinstalling things a bunch of times. But it still occasionally dies on me.

And it worked fine for months, or probably years, before this.