I've tested remote viewing on my iPhone. I have a remote user who installs the QuickSupport app on his iPhone. We get to "Start Broadcast". I can remotely see the seconds incrementing on his phone. I ask him to "swipe up from the bottom of his phone", and when he does, the connection breaks and he sees "Start Broadcast".
I have tried to recreate this on my iPhone but have been unable to figure out why it's not working for him. I cannot support him further, at this point. What is he doing? The only thing I can think of is that he's trying to swipe up from where it says "Stop Broadcast".