I believe that version 145.0, newly installed on the 9th December, 2025 was showing server folders correctly; the server folder name matched the client folder name. After upgrading to 146.0 on the 10th December, the server folder names for some folders are displaying with different client folder names. The IMAP account has both "spam" and "junk" folders, Thunderbird is now displaying both as "Spam", you can only determine which folder is which by showing folder properties. It appears to users that there are two "Spam" folders now and not the two distinct folders with their own names. Similar behaviour is happening for "Sent" and "Sent Messages" folders, both now display as "Sent". These changes are confusing, the client sees two "Spam" folders and two "Sent" folders instead of the original proper server folder names. Why has the display name for these folders changed? How can I get TB to display the real underlying folder names?