Sometimes Figma is incapable of resetting overrides. See video.
This was also connected to the same bug. Are you still having issues?
I am still encountering the bug. See here: Loom | Free Screen & Video Recording Software | Loom
Thanks for letting us know! Sorry to hear this is still happening. Please reach out to the support team directly via this form for help: https://help.figma.com/hc/en-us/requests/new
Be sure to use your Figma account email, include a link to the file, and share it with firstname.lastname@example.org, so they can take a closer look.