This is bizarre,
sounds like your friend might have too many things going on, but you’d have to use OBS debug to go in and look for errors.
Last I checked ObsLive was just a plugin for OBS, so it shouldn’t be doing anything bizarre, but if they have OBSLive, streamlabs, bots and other stuff, could be an issue of too many cooks.
But again, you’d need to debug inspect the browser source to look for JS errors etc