I had the same issue day one in them. I haven’t had the shells molded yet, but did do the liners. Admittedly it was a damn cold day- low teens and 30-40 mph winds - but I don’t recall having my feet go numb for that long previously, and it felt more like a circulation thing than cold exposure. Day two was with my intuition power wraps remolded to this shell, and no issues. I also had a much more locked in fit that required far less buckle tension, which I’m thinking is the silver bullet. To address some of the other questions and for your reference for comparison: my shell fit is about 1.5 cm, so tight, but not race-tight. I have a narrow calf, tiny ankle, and flat as hell feet, so getting locked into the heal pocket has always been challenging for me, and has often meant cranking the buckles. Enter the intuition liner. It’s not a cheap investment, but if you can swing it, I’d consider it. The platinum liners in these seem good compared to most, which is why I gave them a try. (That, and they just felt so comfy!). Turns out they still don’t hold a candle to a pair of intuitions, IMO.
Also, don’t forget the custom footbeds if you don’t have them. Combine them with the intuitions and it’s a game changer.