Re-enabling those file extensions is easier said then done.
Rebake doesn’t throw any error. So, this gets only noticed if you take a look at the Sidekiq queue and realize that there are way too many tasks in the retry queue.
And then you need to figure out which file extensions are missing. The error message doesn’t give a clue about the filename and extension. The same goes for the file size.
This might be an edge case (I noticed it after an import and rebake of all posts), but I think this should be handled somehow.