The desktop version of https://player.siriusxm.com doesn't play audio or react to taps on its images in mobile Safari. Tapping the play button just results in a blue square around it. Tapping on clickable text will change the player's artwork but it doesn't start any sound. None of the marquee images or tiles on the main page react to anything except a two-finger tap which just brings up a context menu. Videos sort of work. They will change the info the player shows and will display the runtime, but they don't usually actually load until you go back and forth a few times through the pages. It works fine in macOS Safari.
I hooked my iPad up to my Mac to debug it with the Web Inspector. Although tapping the images and videos didn't generate any console errors (though they still didn't work), tapping the Play button gave me this: "[WARN] AudioPlayerService - togglePausePlay( Unknown State: PLAY )"
Oh, and this. I tried to look through it but their JavaScript is obfuscated. [Error] ERROR – "error" Qs (client.bundle.808a850.js:1:102636) (anonymous function) (client.bundle.808a850.js:1:200715) next (client.bundle.808a850.js:1:214727) (anonymous function) (client.bundle.808a850.js:1:189448) (anonymous function) (client.bundle.808a850.js:1:881570) (anonymous function) (client.bundle.808a850.js:1:880723) (anonymous function) (client.bundle.808a850.js:1:879783) (anonymous function) (client.bundle.808a850.js:1:879455) (anonymous function) (client.bundle.808a850.js:1:1038745) (anonymous function) (client.bundle.808a850.js:1:189229) (anonymous function) (client.bundle.808a850.js:1:209578) (anonymous function) (polyfills.client.bundle.808a850.js:1:140762) (anonymous function) (polyfills.client.bundle.808a850.js:1:135962) (anonymous function) (client.bundle.808a850.js:1:210288) onHandleError (client.bundle.808a850.js:1:209545) (anonymous function) (polyfills.client.bundle.808a850.js:1:140868) (anonymous function) (polyfills.client.bundle.808a850.js:1:136684) (anonymous function) (polyfills.client.bundle.808a850.js:1:142555) (anonymous function) (polyfills.client.bundle.808a850.js:1:142443) (anonymous function) (polyfills.client.bundle.808a850.js:1:128815)
<rdar://problem/81623556>