@jdaviescoates I have indeed. I believe that something must have happened to my block storage, as I since noticed that it was no longer mounted at all. Unfortunately I think the images are simply not there at all.
In terms of things I had personally shared, that is just a lost cause now I believe. No major harm done there. But regarding avatars and images from remote posts, is there some way that I can force Mastodon to re-download these rather than trying to pull from a local source that doesn't actually exist?