Hi, 

The tray icon supplied by the multi-notifier plugin doesn't work as expected; it doesn't show the main window after clicking on it in the systray nor does it bring the right-click pop-up menu. This is happening in Debian Bullseye, Fedora 34, openSUSE Leap 15.2/Tumbleweed, and KDE Neon with Plasma 5.21, and running in a Wayland session. As a workaround I'm launching claws-mail with GDK_BACKEND=wayland and that kind of "fix it", but it's a bit of tricky; only works if I click in the right spot, usually in 1 corner of the icon, otherwise clicking the icon does nothing; no right-click pop-up menu, no main window, and I have to "killall claws-mail" from terminal.  

Thanks.