Dear support team, My thunderbird freezes temporarily whenever it is checking for emails (IMAP accounts). It is as if the thread that takes care of the GUI/user interaction is blocked while the emails are being checked. I have version 102.4.2 on a Ubuntu 22.04 system (lenovo thinkpad T440s), but it has been going on for a couple of months already (so the problem must have appeared already with several earlier versions). I had exactly this problem already before a recent OS update from Ubuntu 20.04. I have also another computer with Ubuntu 20.04, where I use thunderbird, with the same IMAP accounts set up, and where I never had this problem. Do you have any idea what could potentially be going on? Thank you very much in advance. Best regards, Matthias