When I restore and older version and press done, the screen is largely blank, not matching the restored version before posting! Press 
at the upper right to search.
hmmm…I think this may warrant an investigation from our support team. There could be some corruption happening with your file, but I won’t be able to tell on my end, unfortunately 
If you haven’t yet, please fill out this form – please make sure to include the name of the file you are working on. If you are able to, please share edit access to the file with support-share@figma.com. This allows the support team to look into the file directly.
You won’t be charged for sharing to that alias. Thanks @Randy_Fielding!