Thanks for the report Dominik. Would you mind filing an upstream bug at https://bugzilla.mozilla.org/enter_bug.cgi#h=dupes%7CCalendar, and sharing the link to it here?
** Changed in: thunderbird (Ubuntu) Importance: Undecided => Medium -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1869470 Title: Can't minimize Thunderbird Lightning reminder window To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1869470/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
