I doubt that's it, the fact is that Bayern are not doing well, that's already visible... for the last 5 games:
2 wins and 2 consecutive draws
this is definitely not normal, this bayern is not as strong as in past seasons and i would venture to say that at this rate they will have difficulties to win the bundesliga this season and may not even make it far in the champions league
there is no denying that the performance of Julian Nagelsmann's squad has declined, unlike in the first three games of this season which were so convincing, the next three matches only ended in a draw, as a result, Bayern's position is currently below Union Berlin and Freiburg. IMO, Julian Nagelsmann is too focused on the Champions League so that in three Bundesliga matches their performance is not so optimal and the change in strategy made by Nagelsmann is not very effective, especially at home to Stuttgart.
This is an important note for the Bayern Munich coach to fix the performance of his team for the next match.