Frozen Game After Setting randomTickspeed To Maximum

I set the randomTickspeed to the maximum I could set it to and everything seemed normal but when I tried to right click my smoker the window didn't open. When I tried setting my gamemode to creative it also didn't work. Nothing in my world was moving. I could only interact with doors. When I tried leaving, it was stuck in the saving world screen for 3h. After the 3h I shut down my computer to close MC. That was on 1.15.2. I'm on snapshot 20w21a and it's happening again. I tried the restore previous versions but it there weren't any.