Question / Help Ingame Sound Delayed but voice is accurate - OBS Problem?

[Falk]

Since a while my Ingamesound is not sync to the game anymore even tho my lips/personal voice is accurate and synchron

https://clips.twitch.tv/DreamyShinyJamPlanking

This is a Twitch Clip for you to see an example.

I dont know what to do. Help is greatly appreciated. Thanks alot!