Hi, There is a change merged in upstream which should fix this issue. Details at: https://github.com/OfflineIMAP/offlineimap3/pull/56
It will be great if you can test the latest HEAD from github and confirm if it fixes the issue. I can give you a deb package if that is easier. But in any case, I think the change is too big to be included in Debian during this time of the Bullseye freeze. I can add it to bullseye-backports after the change has been properly tested. -- Regards Sudip