Hi Jean-Paul, It looks like this issue is similar to bug 1932328. May you check this please? If yes, please mark it as duplicated.
Cheers, Matt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1936393 Title: thunderbird window hided and abnormal context menu To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1936393/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs