A crash report is needed too.
Normally when something isn't working correctly on OBS is caused by a plugin, the GPU driver, other drivers, etc.
Make sure the plugins are updated and compatible with the OBS version you're using.
Run OBS in safe mode and see if it works as intended. Some plugins may cause a crash even in safe mode.
Also, please review and follow directions and recommendations on the analyzer:
https://obsproject.com/tools/analyzer?log_url=https://obsproject.com/logs/rRNkAOqxBiXCLOms#logURL