For the past two weeks, I have had the issue of my sole folder on one email account being deleted or disappearing. I receive a daily email which I have set up to filter into this folder; at irregular intervals (every few days, not on a set schedule) I notice that this one folder disappears and the emails are instead replaced into my main inbox. The filter command remains, but the destination folder has disappeared so the filter cannot run properly. I've recreated the folder four times now, and had the same issue happen repeatedly. Just now, I tried to recreate the folder again and though I've gone through all of the appropriate steps, once I hit 'create folder', nothing happens. What's going on?

I'm using IMAP, Thunderbird version 102.7.0. I have two email accounts - one on gmail, one for work - and the folders are only affected on the work email; all of my gmail folders are intact and filters are working fine.