No idea if related or not
- but plenty of others with that PoS plug-in StreamElements (which on top of its other 'issues' pukes all over the OBS log). Have you tried uninstalling/disabling it?
- And I see you have monitors at higher refresh rates and a non-simple division to get to 60fps. This isn't my area, but I recall others recommending such ... whether that applies in your situation or not, I'm not sure [the suggestion being capping game frame rate.. and possibly monitor refresh?? to simple multiple of capture rate, so if streaming/recording at 60fps, maybe use 120MHz refresh rate?
again, not sure this will make any difference to your setup...