On looking at my iPhone this morning the Wahoo App was showing waiting, and was unresponsive. I've learnt now that powering off and restarting is the best thing to do. (Several times the Elemnt has said it can't find the phone, though the phone is showing the Elemnt as connected. Restarting solves this.) So I did that, and the app then updated itself. (This is a bit strange, as I don't have the apps set to auto-update. The iPhone had just updated itself, though, so maybe it was something to do with that.)
Then, on the afternoon ride, the Di2 hung and dropped, as did the heart rate monitor. I tried reconnecting the heart rate monitor (took the unit off the handlebar mount, placed next to chest) but nothing doing. About 20 mins after the Di2 dropped, the display reflected this, though the led were still showing 3 green.
I never had those sort of drop outs with the Garmin 810.
Felt nostalgic for the days when things either worked or they didn't. (First Elemnt I received, mind, was DoA.)