We are implementing a screenshot function with a Lens Flare in AR App on iOS.

We found a problem follows:

A Lens Flare is disabled at call Texture.ReadPixels on iOS!

Here is the screenshot and the simple unity project.

(See Attached File.)

if ProjectSettings > XR Setting > Vuforia AR was checked, This problem happen.

if that was Unchecked, This problem NOT happen.

Environment:

Unity2017.4, Xcode 9.3, iOS 11.2 on iPhone X.

More Information:

There are no problem on Unity Editor and Android.

Is there a solution?

Best.