This should be upstream in Electron. In fact, up to date version of Slack sends notifications correctly for me without any additional movements and workarounds.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1547448 Title: Ubuntu 16.04: Notifications of some apps displayed in a classic window To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1547448/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs