I built Xfce-panel 4.14.1 for LinuxMint 19.3 'Tricia' (which has Xfce 4.14 by default) GTK 3.0-3.22.30 , as I had the same issue. But it still did not work out of the box. On checking bug #16106, I enabled compositing, brought the Enter and Leave opacity to 100, disabled Compositing, and restarted the panel and only then did this fix work for me.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1797417 Title: Background of system tray icons not drawn properly To manage notifications about this bug go to: https://bugs.launchpad.net/xfce4-panel/+bug/1797417/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs