Форум сообщества Thunderbird

Thunderbird 115.1.8 (most recent), Windows 10

This is going to drive me awy from Thunderbird - at random, it refreshes and opens all folders when connecting to IMAP accounts, leaving all folders open. Screenshop attached of part of folder tree - it happens to each and every sub-folder in the account(s). Sometimes it's just on one IMAP account that I have defined, sometimes more than one. Some points that might help (or not):

• The status line says that it is downloading messages, even though I've told it to only download headers
• This happens on more than one installation of Thunderbird on different machines (home deskside and laptop), all on Windows 10. I don't have access to Linux but might try it on Linux on a Chromebook. I've avoided Windows11 so far.
• no way to reproduce this on demand; just random
• Persists at random after a clean installation of TBird with completely new profiles
• Takes ages to close all folders - I think I've seen elsewhere that an option to collapse all folders by, for example, a right-click on the top-level folder and an option in the context menu, would be very useful
• happens to different IMAP hosts - my personal accounts are on UK2, but also affect gmail and IONOS-hosted accounts
• is an issue with many previous versions - certainly since Supernova was released, maybe earlier

Much as I like the TBird interface, I can't continue to live with this - I think it's back to Outlook (I have a 365 account so thiis is the full-fat Outlook) or maybe invest in an emClient license, where their limited free version seems robust and has a decent interface. Might also look at the email client in the Vivaldi browser.

Any advice that might help me stay on TBird would be welcome. Thank you