I’m not sure how long it took, but for a while the instance had crashed. For some reason the Lemmy photo upload service took up 150GB of free space and hence the server crashed because of it. I’m not sure about the possibility of recurrence as I don’t know the exact reason.
For this reason, you can follow our Mastodon account, which I have just opened, to follow or report possible crashes.
At some point a couple days ago, I stopped being able to update icons or banners on communities. I’ve tried everything I can think of on my side, including appointing a friend as a mod, who was also unable to edit the images.
[EDIT] I had both English and Undetermined selected somehow, and as per user suggestion I fixed that, and it worked! I can now update images, I just had to select ONLY undetermined.