About 10 - 20 seconds before that message, the video started stuttering, lagging and freezing - so I began heading back. Then the message "Mobile Device CPU Overload" appeared. I'd never seen that before.
After landing I went through the (usually unnecessary) process of flicking all the loaded apps away. Then I looked into the "background update" apps and found an awful lot of them enabled. Maybe that was it. (How they got enabled for bg update is a mystery - I only allow a very few apps that privilege - perhaps the last iOS update did it...).
After that, flawless.
(iPhone 6+).
After landing I went through the (usually unnecessary) process of flicking all the loaded apps away. Then I looked into the "background update" apps and found an awful lot of them enabled. Maybe that was it. (How they got enabled for bg update is a mystery - I only allow a very few apps that privilege - perhaps the last iOS update did it...).
After that, flawless.
(iPhone 6+).