My copy of the physical game arrived on December 21 (Boston, Massachusetts, USA). (Well, delivery was attempted, but required a signature so I had to go to the post office the next day to pick it up.) Will try it out tonight.
I played with a mix of Android and iOS, and the only time we disconnected was when someone took Yo-Ho off the main screen. When the phone was darkened (to save batteries), or someone checked a text or something, the current player's turn couldn't pass and would just "hang" until all players' phones were "ready" again.