webAR iOS Version performance issue (some feature not working)

Hi ZappAR Community

I am perplexed with iOS performance in AR .
I have developed WEBAR solution . using Unity ----(2020.3.6f1) –
It works well on Chrome and All Android devices .
and some iOS devices it works , in some it is not although ios version would be same
i.e some IOS 11 it works , but again in some other iOS 11 it is not working.
iOS 6s Plus, iOS 8 - it is working
But in iOS 7, iOS X , iOS 11 is it not working

Is there any specific thing which i need to check out
Please assist if anything I am missing out with this issue

Hello. What’s not working though? Cause for us, we have an image tracking experience using Zapworks Studio and some iphones r having issue where by if unlocking + camera sees image target > after unlocking nothing happens BUT if unlocking + camera DOES NOT see the image target > after unlocking > point camera at image target experience work as expected.

Maybe you can email the support team : support@zappar.com. I am currently waiting on reply from them as they asked for the project file.