My daughter is off at college and tells me trying to watch some content that she's seeing audio stutter on her iPhone 12 when watching content not recorded by Channels.
I saw there was once an "experimental audio" setting for iPhone audio stutter but not sure where that setting is. I don't use an iPhone so hard for me to compare, but the show she was having an issue with played fine on my Note 20. I did turn on "Use HEVC" for transcoding to see if that helps but haven't heard back yet.