Missing screenshots

Hello,

My app is missing screenshots - I thought it was a temporary issue with Flathub when publishing the initial version but the problem persists after publishing a new version - I have no idea why.
GNOME Software displays the screenshot properly when I use a local remote to preview.

https://flathub.org/apps/details/re.sonny.Junction

Any idea?

It might be a problem with the aspect ratio and resizing, read here: