I can reproduce the issue. I think it is because it is an X11 app which is being run through Wayland directly.
Please try the following command from a terminal:
GDK_BACKEND=x11 flowblade
I can reproduce the issue. I think it is because it is an X11 app which is being run through Wayland directly.
Please try the following command from a terminal:
GDK_BACKEND=x11 flowblade