Qt on wayland has broken dockable widgets

Undocking a dockwidget by dragging it out of the mainwindow will cause the widget to have no window borders.

This makes it impossible to move, resize, close and redock the widget again.

Undocking it with the undock button makes it appear with a window border that make it possible to move and resize it, but docking it again is still not possible.

In the right there is an undocked widget without window borders.