Running Win10 - Thunderbird 128.5.2 My Thunderbird app is associated with 5 Gmail accounts. Configured to: IMAP Mail Server Port: 993 Connection Security: SSL/TLS Authentication Method: OAuth2 Problem: When I launch Thunderbird and subsequently attempt to open a message in an Inbox, Thunderbird starts downloading over 400 messages. It attempts to download the same 400+ messages every time it's launched. Attempts to navigate within Thunderbird while the downloads occur result in "Thunderbird not responding" making the app useless. Mitigation attempt: I've reinstalled Thunderbird from the Thunderbird site, but it did not fix the problem. Anyone else have this problem? What's the fix? Thank you for your reply.