Thank you very much! And yes, iOS devices are known to have trouble loading sound files probably because of some weird Apple developer thing. I have to provide both .ogg and .m4a audio files because iOS can only read .m4a, but even then some people can't hear sound. I end up blaming Apple because I'm doing what is expected and their devices still can't hear it.
I will be transitioning from the Phaser game engine to the Godot game engine, so hopefully your bugs will disappear after the switch! Please be patient for this update as I just announced it today.