MQTT Engine updates value, but not Tag Provider

Hi community,

at the moment I am having some trouble using MQTT in Ignition.

I want to create a visualization for my home automation system iobroker using the Maker Edition of Ignition.
Both gateways are running on the same machine in Docker Containers in macvlan configuration, so all ports will be published.
They are publishing to the same MQTT Broker on the Ignition gateway.

Unfortunately, the values received by iobroker are updating on the Engine module but not in the Tag Provider.

Here the Transmitter and Engine Settings.
No custom Namespaces are used.

Sometimes I can see an Error and Warning message in the log.
The disconnect from 27Jul2023 07:11:48 was a testing client and has nothing to do with the productive system.

I tried to follow the advices on the following topic without success as well.

FYI, the other way around works fine, I managed to control an LED strip from IKEA.

Best regards,

Moving this topic to Maker, because I am using the Maker Edition of Ignition.

Best regards,