As far as I'm concerned Bayern Munich doesn't have a solid defender therefore they are easily penetrated easily. Just look at how porous Bayern defense is filled with Kim Min-jae, Upamecano, Laimer even Davies who just signed a new contract shows a decline. If Kompany really wants to survive in the UCL or in the Bundesliga to maintain his current position, he must automatically be able to bring in a much more solid defender.
Don't forget, from the start Bayern Munich management had gambled by bringing in Kompany, even though many famous coaches refused to become Bayern Munich coach because they already understood very well the character of Bayern top brass who always kicked out coaches in a disrespectful manner (Tuchel and Nagelsmann).
The management of Bayern always had high demands, and sometimes this prevented them from assessing the situation objectively, as it happened in the case of Nagelsmann. I still think that he was a great coach and I still do not understand why he was fired, because I did not see a decline in the team's results, they simply decided that he needed to be fired, due to some internal disagreements, I do not see any other reason. Now Bayern has problems with defense, this is what the company needs to solve first of all.
We won't just judge because of one match that went sore. When Bayern won Domino Zagreb 9-2 earlier this season we didn't find fault in their defense, even when they won against PSG their defense wasn't faulty but now we are seeing a slack because they failed to win and ended up conceding 3 goals.
In football anything can happen and this goes to all teams where none is exempted. Bayern still has one more match to situations in the Champions league and I am counting strongly on them to deliver. As for their domestic league I am sure they will hold their position till the end of season.