Upvote:4
No, in this case you will not have a problem:
As stated by Willeke, you clear immigration in Schengen at your first point of entry, which is MUC. This happens no matter if you continue to Paris or not, and no matter whether it is the same ticket or not. German authorities will just clear you through after asking standard questions.
Since your first point of entry is in Germany, it is unlikely they'd ask any questions, as they don't know how much time you'd spend in each country - and if this country is Germany, you got the proper visa for that.
So immigration problems are unlikely, but of course other possible hidden city ticketing problems remain.