Copying an image to the Wayland clipboard results in the image having the wrong MIME type, making it impossible to paste it in non-Qt applications.

Testing in both Spectacle and Telegram Desktop (Qt application as well) results in the image having the MIME type application/x-qt-image (as shown by wl-paste -l).

Copying from Firefox (GTK application) results in multiple types, including multiple image/* results which allows pasting to different applications.