Musescore.com file embedded in webpage - problems in Safari, iPhone

Hello,

I've created a webpage in order to share my scores with my choir. It works perfectly in Chrome on my mac, but not in Safari. Also, I'm having problems with the iPhone but it works perfectly in Android (at least the model I was able to test!)

The specific issue is: I'm sharing the score for rehearsal purposes, so the most important feature for me is to be able to only listen to a specific voice (Soprano, Alto...) while the program automatically scrolls through the full score. In order to do this, I need to select "Synthetizer" as the audio source, then click/unclick the desired voices. When trying to do this on the iPhone, I get a message "Midi playback is not supported by your browser/platform".

I've been looking around on the web, and it looks like it's an unresolved issue from Apple with MIDI, so I'm not sure if this is something the Musescore developers can actually do something with. Is there some workaround I can use? Is this something you're aware of and trying to fix? Can I expect this implementation in Musescore anytime soon?

Thanks