fullscreen window call hide to show black surfface on wayland

Hi

When set a window state as fullscreen, then call hide on wayland, it show a black screen. But it except to be transparent. I know that's because weston desktop shell create this black surface. But I don't know how to reslove it.
Is it not support hide function on wayland?
Most qt app developpers don't know it. They still use it. So it cause this problem.

Does Qtwayland can fix this problem?

Best Regards
Nancy