Every once in a while when I play nervegas, my game will randomly freeze for around 10 seconds and when it resumes, the sky is a really dark blue and I can't see any kind of nade/flash/smokes being thrown (i.e. After a player releases one so I can't tell where it lands). Flashes don't flash me even if I know it was in front of me (tested it) but I still hear the high pitch drowning sound. Smokes also don't show on my screen but they make me FPS much harder than I have ever FPSed before (15fps). It only started recently and doesn't happen every game. How do I fix it?