Pos. Pron. und Nom. Pron. Bug?
When completing a session in Pos Pron, the Nom Pron also gets completed. This "works" in reverse as well.
Yes it's a bug that was reported a while ago. It's sad that I guess it isn't fixed yet. There are a number of different skills on the German tree that have their crown progress incorrectly linked. My guess is that the skills somehow accidently use the same variable name or database entry for more than one skill.