Hi @maufl,
Thanks for joining the Community!
What you’re seeing has been confirmed, and a fix is in the works. There was a similar topic a little while ago about this (topic), and the team responsible for Actions have created a backlog item to include the root attributes from identity providers such as Google’s groups. I’d estimate this update to be complete by the end of this quarter (end of the month), but I don’t have a guaranteed release date yet.