I had that same thing happen to me not long ago with an 11.8 AB. Super gusty/lully/shifty wind, messed up a jump and overflew the kite into a lull. Tried reverse relaunching and it came up off the water and just tied itself into a pretzel. Couldn't undo it in the water and the kite was so twisted I couldn't even use it for self rescue. So I deflated the leading edge, rolled it up and swam in.
First time it's ever happened to me. I blamed it on the flukey wind and the 2001 (can't inflate too stiff due to weak bladders) high AR kite....couldn't possibly be operator error
The one difference was that this was the first time I was trying a nose down reverse relaunch while wearing a wake + bindings so I was on my belly with the board behind me and mostly out of the water. I think that this may have contributed to the problem since in this position I was offering minimal resistance to the kite.