New MQTT device not showing up

[kolossboss]

Hi,

Today I added a new mqtt device.
Broker is EMQX with the official Addon.
The devices is showing up in the Broker, but not in the MQTT Intergration.
I have 18 other devices. All working perfect.

I also reconfiguered the MQTT Integration, but no success.
The MQTT device (Ahoy-DTU) has Auto Discovery.

What can be the issue?

Thanks a lot for helping.

[kolossboss]

Ok found the error. There was an blank in the topic. So its not exposed correctly.