Entry completion drop-down is misplaced on external monitor when on Wayland
Submitted by Debarshi Ray
If you run gtk3-demo -> Entry -> Entry Completion inside a Wayland session on an external monitor and type "total", the entry completion drop-down is placed somewhere far away from the GtkEntry. Depending on the exact layout, you might see it somewhere outside the GtkWindow or might not see it at all.
It works as expected if the GtkWindow is placed on the laptop's built-in display.
Versions: gtk3-3.22.2-1.fc25.x86_64 mutter-3.22.1-6.fc25.x86_64
The bug is visible regardless of whether the external monitor is set as primary or not.