I don't know the best way to explain this. I have been running OBS for a while now and stream quite often. I just started getting an issue where my video capture kind of tears whenever I mouse over something. It's really odd, and I am baffled what's causing it. The tearing also transfer over to the stream. Here is a quick photo when I am not streaming, and a link to a video where I am. Also included a log file to review. I have already uninstalled and reinstalled OBS.
OBS Not streaming:
https://puu.sh/DKEwn.gif
OBS Streaming:
https://puu.sh/DKEPt.mp4
OBS Not streaming:
https://puu.sh/DKEwn.gif
OBS Streaming:
https://puu.sh/DKEPt.mp4