Roblox Studio particles are broken for most right now. Ever since the new update, I have seen lot’s of posts about the same thing. I presume that’s the problem. I’m not really sure though. If this continues to be a problem I would suggest contacting Roblox Support.
Hey! This was happening to me too, then a team member just gave me a solution and it WORKED! Turning off Particle Flipbooks (in beta features) fixed it for both of us. (make sure to reopen studio after disabling flipbooks) I hope it works for you too! Good Luck!
Yup - This worked for me too!
Just to clarify how to do this, go to “FILE” in the top left of studio, and click “Beta Features”, and scroll down and untick “Particle Flipbooks” (it’s about 5 from the bottom for me atm). Then click save and restart studio as prompted!