Hello, I had a problem yesterday that game droped for me to 10 stable FPS from 60+. I thought sea is making that FPS drop so I lowered water quality from high to medium, so FPS dropped to 5 stable(might be another bug, not sure). Restarting game helps. It happened few more times and I was able to find how to reproduce it. Simply open inventory or skill tree and alt-tab to desktop few times(wait for game to really minimize), being in inventory/skill tree might be unrelated, but I didnt check.