Yeah, I did have... well, it would change as I tried to go to that last one. (That's the default I think) The problem was I wouldn't often get there and if I did, it would change the front when I was applying a lot of force and might jump the chain off, so I've gone semi sync (I think you've described fully. Semi means I control the front but it adjusts the back for me when I do). Now I try to prepare for a climb by getting into the small ring in advance of the big effort going in. This photo was at the top of a climb I wanted to power through, so I don't think I dropped to small, but likely as I got near the top was struggling