Background colour not showing on iPhone X

[graphicz]

Not uniquely SD but has anyone had issues with sites displaying correctly on iPhone X? Particularly a div not displaying its background colour which displays correctly in all other browsers known to man!

Thank you

[Mike Hughes]

It sounds odd that one device should have different display rules to everything else running IOS safari.

I'd consider looking at other factors, maybe IOS 12 ? or Accessibility Options?

[graphicz]

I seem to have fixed it according to the client (I don't have an iPhone X!).
I used a sledgehammer approach I am afraid.
All elements were z-indexed appropriately and instead of

background: #FFFFFF;

used:

background: #FFFFFF;
    background-color: #FFFFFF;
    background-color: rgb(255, 255, 255);
    position: relative;
    z-index: 99!Important;

Just in case it helps.