@goldengate415’s solutions solved it.
But now I have to change child theme’s header on all my websites!
Not the smartest update, I must say…
Hi, we are having similar issues here.
It looks like some images and slides don’t show up properly on iPhone and on some versions of Internet Explorer.
This happened after the latest WordPress + Enfold Update.
Actually, if you only updated WordPress and NOT Enfold, you couldn’t see images at all (on any device).
Updating Enfold too seemed to solve it, but it looks like there are other related isues.