Content fills only quarter of gnome-maps on HiDPI on Wayland
When I open gnome-maps on Fedora 27 or 28, only a quarter of the window is filled with the map. See attached screenshot. The problem happens with two monitors attached: one normal, one hidpi one. The window is fully filled on the normal monitor, while it is only partially filled on the hidpi one. When the normal monitor is disabled in the display settings and only the hidpi monitor remains, the full window is used.
There is already a related gnome-maps bugreport: gnome-maps#108