Sound crackling issue on iPhoneX

Hi everyone,

we are developing a sound app for iOS and we are experiencing crackling static sound issues on iPhone Xs, XR, XS and 11.

The app runs perfectly smooth on older iPhones, on Pixels, Samsungs etc. but for these newer apple phones we have popping issues.

We found that the crackles stop if you are outside the app or if you use earphones (either in or out of the app)

Has anybody experienced similar problems?

We can reduce the buffer size on the sound engine side, but we want to preserve latency.

thank you!