Mosquitto logins users stopped working


I have this configuration for my mosquitto addon:

  - username: someuser
    password: somepasswd
anonymous: false
  active: false
  folder: mosquitto
certfile: fullchain.pem
keyfile: privkey.pem
require_certificate: false

and it had worked fine for ~3 months. But for some reason the user someuser doesn’t work anymore. Mosquitto is complaining that it doesn’t know this user:

[WARN] Not found someuser on local database
Socket error on client <unknown> , disconnecting.

a default HA user still works as documented, but the new ones added here don’t. I turned on auto-updates as well as tried to restart the addon, but it didn’t change anything.