Metatag issue with OH3

Guys, I switched to OH3 and I am totally stuck in simply including my lights.
Did someone work with dimmers in OH3 yet? There seem to be issues as they behave different than other points and automatically (but undesireably) appear in Goggle Assistant.

Maybe you can comment here OH3 MainUI: How to register (and exclude) items for Google Assistant and Amazon Alexa?. I am not sure whether this is a bug or a mistake on my side.