Hello! I'm Jen, and I'd be happy to help you out with this issue.
I'm sorry to hear you're experiencing this issue. Try clearing Roblox cache and check if it helps. To do so, press Windows + R to open Run dialog box. Type in %localappdata% and click OK. Look for Roblox folder and delete the contents of it. Clearing the cache folder of any application doesn't affect its performance or your data. Restart your computer then verify the result.
Let me know if this solution works for you. If not, please feel free to reply, and I'll be happy to provide further assistance. Thank you.
Best Regards!
Jen :)