Hydrate it with water, that should help.

Same, I migrated from Plex to Jellyfin about a year ago. It’s just as solid without any of the bloat, local authentication just in case the internet goes down, and transcoding isn’t locked behind a membership.

Not really, unfortunately. You’d have to create the community on a different instance, make a sticky post in the original community redirecting them to the new community, and then lock the community to prevent new posts. If you don’t have a lot of content in the original community, or don’t care about keeping it, you could delete the community after a week or two once people have subscribed to the new community to prevent confusion.

I almost made the rash, uninformed decision to close up shop on lemmy.world and move my community to another instance. Luckily I did some further reading, and yeah, unless whatever other instance I jumped ship to was also patched I would have just been wasting my time since this is a vulnerability in the Lemmy code and affects all instances until the admins apply a bandaid/the code is fixed.