Mine did the exact same thing as the HPFP was starting to go. Within a short period of time, it got progressively worse until it was obvious, with progressively longer cranks, etc. The car should reach and hold 1000+ psi of fuel pressure instantly after start-up and maintain it constantly. If the pressure immediately drops, it is because it is not priming and holding the fuel pressure. For whatever reason, the pressure would always come up on the second crank and it would hold the pressure until the next cold start. Initially, this was only a problem on the first start of the morning, then got worse. The car will initially start on the ~75 psi of the LPFP, but that will only allow it to run rough and stall.