Only one of my email accounts, an IMAP outlook.office account is having problems saving sent email to the Sent folder which also keeps disappearing. When I subscribe to the "Sent" folder it appears briefly upon restarting, but then disappears after about a second. When I try to send an email the Sent folder will reappear (and then it re-downloads older sent emails from the server), but the current sent email is not saved to the folder (it hangs at 100%) and eventually the sent folder disappears from the list again. The sent email is on the server in the sent folder (or sent items folder), however. MacOS 11.7 (Big Sur) Thunderbird Version 102.4.2 Thanks