Primary selection copy and paste from X11 app to Wayland app does not work
With a fully up2date Fedora 31 system + latest mutter + gnome-shell from master select + middle button paste from a X11 app to a a Wayland app does not work, even though the middle-click paste option in gnome-tweaks is enabled. Making a matrix for middle-click paste it looks like this:
X11 -> X11: works Wayland -> Wayland: works Wayland -> X11: works X11 -> Wayland: does not work
Ctrl+c + Ctrl-v does work in all 4 scenarios.