Blog Post
I've been hearing about an issue that the home enviroment runs really bad FPS wise and I've had that same issue for days now, but one day I noticed how it would load up the bubbles enviroment and then the one I actually have selected, so today I went to the settings, switched to bubbles and then back to my other one and it got smooth again, I think it's rendering two enviroments rather than one.
I haven't rebooted to see if it got fixed entirely, but that seemed to address the low FPS.