I had 2 sets of 7’s, one set a zed8 2stage and the other set on an orange 5. both had same problem, where at some point, well into the descent, I would release the levers and on the next grab they would go straight to the bars. Fortunately the first time it happened I had the sense of mind to pump the brakes and get some pressure back, but from that moment on, my only option was to either hold the brakes on or stop and let them cool down.If I released at all the next grab would go to the bars.
I would have to wait a few mins before descending again. Happened repeatedly, both sets and I learned to anticipate it. Scary! It might be urban myth but I had heard some resorts have banned them (Avid Juicy) and I can’t verify that, just heard it in bar talk in the resorts.
Maybe I needed higher DOT spec fluid. Pads were Kevlar. I think it’s fair to say I maybe cover my brakes too much, but I never had the issue with formula or XT when I put them on the bikes.
Uplifts? Ski lifts in Morzine/Pila and Verbier, shuttle in Finale and Garda.