Mine did the same when I came home to cooler temps after doing a G-Power mod. I ended up changing the HPFP to XDI-35 and I now have zero issues and even took out more power.
After logging I saw the original HPFP started loosing pressure at around 5000rpm and at 6000 my car stuttered hard. Now with even more boost the HPFP keeps the pressure up to 7000rpm.