I just updated my IPhone SE and IPad Air 2 to IOS 15 and tested my app.
It seems that the WebGL 2 support is somehow broken regarding SSAO2.
On my IPad i just get a blank/white screen if i use SSAO2. On my IPhone it works but the background color is always black (not the clearcolor i want).
Here a simple PG: it should have a green background with SSAO2 enabled:
Can somebody please test this with other IOS devices. Is it working for newer devices? What would be the best way to detect those issues at runtime? … maybe i have to disable webgl 2 for IOS devices in general