the way I see it is that the more you talk the less you stutter and since quarantine means no socializing and no talking this results in you not using your voice as often so stutter is more prone, or at least in my experience. ​ I'm an uni student and gotta say, when I was still at Uni I had very few stutters but recently I stutter like crazy again now and when you're in class and are expected to talk it is kind of nerve recking and a little annoying that you're holding up the entire class just cause of a lame stutter.