Posts showing wrong featured images.

I have an issue with one particular site on certain devices but not necessarily all devices (hope that makes sense).

https://velveteasel.co.uk/

On ipads (some) it shows a background image that is not meant to be there and shows the wrong images for the post. I can’t see in on my machine but the owner can on her 2 ipads.

I’ve removed the css that displays the background image in the html tag but it still seemed to happen for her.

I have of course checked it on a proxy server to see what the rest of the world can see but she says she has had people complain.

The one thing I know happened is, the featured images for the artists were deleted, then re-uploaded many many many times so that they would show in facebook (grrrr).

I’ve deactivated Yoast and social to remove the opengraph stuff which could be the issue.

I’m at a loss as I can’t see any issues to begin the fix