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Another example, deleted four messages in one go: ``` [2024-09-06 08:46:03,982] INFO:mbox.check_new_msgs_and_flags: Mailbox: 'Archive', num msgs: 3379, num new msgs: 1, first new msg: 3385, last new msg: 3385 [2024-09-06...

I am not sure if this is related or not, but I have now finally caught an issue where it seems we have no longer "SELECTED" a mailbox, and attempted...

Another case: ``` [2024-09-29 23:43:13,894] [email protected] INFO:mbox.check_new_msgs_and_flags: Mailbox: 'Deleted Messages', num msgs: 88, num new msgs: 1, first new msg: 186, last new msg: 186 [2024-09-29 23:43:16,878] [email protected] INFO:mbox.check_new_msgs_and_flags: Mailbox:...

Tenative fix for now is to _not expire_ mailboxes. Error seems to have indeed gone away so the bug was introduced when I added "in use counts" to the mailboxes...