PFSENSE, NANOBSD, 2.0.1
I had the same problem, IPSEC tunnel was establised, all green, no traffic goes through.
When you look at SAD, SAD (Status,Ipsec, SAD)shows me multiple connections.
I think, the reason are short interrupts, Phase1 does not recognise the break, stays established, but Phase2 opens a new connection.
But this does not work.
Change Mode from aggressive to main on both sides. (even with dynamic IPs)