Ok so it is the smallest bounding box of the image in that case, that seems reasonable. So I will need to manually resize the image to fit in the original bounding box for which I will need to scale the image back. The next question that arises is how do I know the bounding box before applying a transform? I will need that to calculate the scaling factor.

Yes, I noticed it yesterday!

This feature is completely broken in iOS 15 betas(including beta 5). I have filed a bug FB9393169 but there is no response so far.

@Media Engineer, please look at FB9393169 I filed...AURemoteIO does not produce samples with builtin mic if stereo audio is configured. Please also suggest a workaround as this is a serious bug for my app and I doubt this will be fixed in iOS 15 main release.