Loose erection immediately after cumming

The two times that I have had sex after the reboot (or at least attempt to due to PIED), I only last for about 30 SECONDS and my erection disappears immediately after orgasm! I am 2 months in the reboot and fell fucking great compared to when I was PMOing. Has this happened to any of you (cumming fast and instantly loosing erection)? Am I having sex to soon in the reboot?

I think your are in recovery stage you have to do well and continue