Sometimes a group of bandits would completely break my game with an insane lag bomb and I have to re-roll to a previously backed up save. No errors, no crash and the output doesn't seem to be spamming anything.

The strange part is that it only happens only sometimes... So the cause is still questionable.
I have narrowed it down to this mod as disabling it restores my FPS from 1 to 120.

I do have a heavily modded game, but for better compatibility, I want to help diagnose this just to figure out what mod is interacting badly (and why), if any. What kind of logs are we looking for?