Can't help you out with the iOS stuff Rumble as all Android here, phone, tablet and a Chromebook. 

GT in Chrome running on Win10x64 PC the client this end. 

Checked moments ago for you. Can confirm sound and animations are working ops normal on the desktop. Also confrmed working within Chrome Desktop on the Samsung tablet (Android). Doesn't appear to be any way self evident to access Toolbox in the new revised interface GT Android app on the phone though.

iOS idiosyncrasy?