I'll give it a shot, but it actually might be simpler than I thought... I had noticed before the update that if I had a few too many tabs open it would craaawwwl to a stop, freeze for multiple seconds now and then. I noticed in the update to the tab groups that there was one that wasn't "active", which meant that my other three groups were all active, or I guess, running but just not visable. I disabled the tab groups I wasn't using, and it's seemed normal since