In Metro 2033 Last Light Redux, I got to the Bandits chapter, and closer to the end, there were 2 guys preparing for patrol (from the dialog). And then they just stand there. Coming closer makes them react oddly, but they do not move. If I shoot them, they just "die" in the standing position. Same for a beast later. Restarting the game doesn't help, restarting from last checkpoint doesn't help, it seems this bug is saved. Only after reloading the chapter from the beginning of it, I could play properly.

One annoying bug was when I got stuck near a corner in a wagon. Another one, when tried to pick up ammo, being crouched, the character stood up and got stuck between the floor/rock and some ceiling. The only option is to load a previous checkpoint.