I've bound "show all windows" for kwin to SUPER+TAB, that is win key and tab, because that's what my MX Master 3 mouse sends when I press the thumb button.

I've also kept the default CTRL+F9 binding.

When I press CTRL+F9 the show all windows screen appears, and when I press CTRL+F9 again, it is canceled and I'm returned to my desktop.

However, this does not work for the SUPER+TAB binding. When I press it for the first time the show all windows screen appears, but when I press it again, nothing happens.

This behavior is the same whether I press SUPER+TAB on my keyboard or use the thumb button on my mouse.

Any suggestions for how to fix this greatly appreciated.

This works fine now.