Wayland window focusing
When there is a maximised window, switching windows doesn't transfer the focus to the newly switched window. For example a maximised thunar and a non maximised xfce terminal. When window switching the maximised window (thunar) gets the focus normally, but the terminal doesn't get it. The problem exists both with labwc and wayfire.
Possibly related is that pop up windows on a maximised thunar don't get focused as well. For example rename pop-up. This happens with other applications too, it's not thunar specific.