No background image visible in PG

I have a full-screen background image on my page that shows up properly in a browser.

However, I can’t see it in Pinegrow. Actually, it’s -partly- visible (small rectangular section), but only when I mouse-over other parts of the interface.

Worked fine the other day. I haven’t updated.

Any ideas?

Edit since I can’t delete: Todays update seems to have fixed it.