Some UI elements are not appearing on Safari IOS

We are currently working on a 2D game. Game is working fine in Windows and Android browsers but some UI elements are not appearing in Safari IOS and Chrome on both macbook and iPhone.
Really appreciate if somebody can help.
PS: there are no errors appearing in console.

Can you provide a public example for this that we could take a look at?

Got it. Thanks. The layers were problem behind this.