Sometimes special HUD overlays get stuck permanently. The perk/buff is no longer in effect, but the overlay just stays on the screen. It will only disappear if you quit to the main menu. The extra stuck clutter is most annoying when you have just started a multiplayer game.
There is a problem with viewing pop-up facts with pause. Sometimes during a cutscene, the game would just pause for no reason without any pop-up facts. The continue key for pop-up dismissal also would not work. I had to press pause on the keyboard to continue and the cutscene would get skipped. I am not sure if this problem was present in older PCs as I have only noticed it on my current Windows 10 PC.
The game does not run smoothly on my newer Windows 10 PC. Every 2-3 minutes the game would pause for about 1 second and the HDD light would be on. I definitely did not have this problem on my older Windows 7 PC.
Sometimes the CTRL and ALT keys would stop responding. A quick fix is to ALT-Tab out of the game and then back in. These are the default keys for crouch lower and aim through iron sights/scope.
There is the bug where sometimes when a chapter is completed, the speech would stop working. Restarting the game would fix the problem, but it is still annoying.
Despite the myriad of options to tweak the difficulty of the game, there is no option for monster respawning. The developer did say that they wanted players to think tactically rather than being able to grind their way to higher levels to defeat bosses, but the side effect is, backtracking to explore missed areas becomes very boring. Inspired by Might and Magic, but also more boring than Might and Magic. There are options for so many other things, why not monster respawning?