After some major fiddling around I have some interesting results to report. I setup the game exactly as I had it on my phone (S22 Ultra) on another Android device (Galaxy Tab A7). Importing a music mod did work on the Galaxy Tab and the music was playing so working mod. However after reinstalling everything on my S22 Ultra. The same working music mod on the Tab A7 did not work on the S22 Ultra. Import was successful just non working music. Also this issue is not isolated to a single music mod. I've tried several music mods and all have the same result. Support did get back to me and verified that the mod imported successfully and they werent sure why it wasnt working from the client side of things based on an error log report I sent in. So now I think we've narrowed it down to device/android version territory. Galaxy Tab running Android 10 works but S22 Ultra running Android 12 does not.