The RP is an excellent filter, but sometimes you get a dud, it happens. I've had a FRAM Ultra that leaked, FRAM sent me two new ones. I've had ADBV leakages with a few filters, some of them premium, on our old Expedition. It is what it is.
OK so first on my list of things to try is a new RP filter.
Apparently if you hold the gas to the floorboards and then hold the starter button, the engine will crank and build oil pressure, but will not fire off until you let go of the gas. Haven't tried it, but I wonder if that would be a good short term bandage type of thing to try out? Maybe 2 or 3 extra seconds of turning over might get the oil to where it needs before it fires off?