This has been something that's been a problem with the M&B games for too damn long now.
The bot AI in these games is dumb as dirt.
Here's two examples of what I'm talking about.
https://steamuserimages-a.akamaihd.net/ugc/924793784747856312/C291465B7F728E0DF8C3F2BB2EA071AB782D1594/
https://steamuserimages-a.akamaihd.net/ugc/924793784747856469/17A73E16A2EDA1280496D403F590A2F873271498/
This is ridiculous.
I'm ok if the AI bots not exactly being geniuses, but the fact that these bots could just get stuck on almost anything is just down right lazy on the part of the developers. There are many mods I've been able to try, but many of them are lessened by the AI's complete lack of any pathfinding and or the slightest bit of "thought" other than to just charge straight at the enemy, god forbid whatever might be in the way.
Now, I have no idea if you dev guys are ever going to finish Bannerlord, but the least you could do is make the AI not so ridiculously braindead. Just give the bots some basic pathfinding AI to where they're at least able to figure out how to go around stuff.