How to fix that? Enemy just doesn't die...

Any idea what to do with that? Whenever I kill a unit, sometimes it doesn't die. It happens randomly, target is just not selectable and there is no way I can kill it, and thus the fight just won't end blocking my game. It's not just zombies, humans and monsters too. I thought it's specific weapon or bro, but I can't find any pattern.

Maybe you have encountered it and some specific mod does it? I don't have any overhauls, just small things for quality of life, like prices of buy/sell, swifter, ranking of bro's rolls, etc...

https://preview.redd.it/twhzfij6c2lb1.jpg?width=1841&format=pjpg&auto=webp&s=dd5e8a6d75a4e9d032ee854e5ac8646475930c2a