I created a feedback report for this here https://feedbackassistant.apple.com/feedback/9966036 (FB9966036 (blob audio issues under iPadOS 15.4)). I don't know if this is accessible/searchable to everyone or not. Kind of just hoping this gets fixed very soon. For now, we created a workaround in our app by loading lower quality audio files so the file size is smaller. This is working for us, but I realize is probably not an option for everyone...
csheff
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution