[cobrin]

Oh, not good...

internal leakage - bearings gallery seals turbo - you name it kinda deal aka mechanical
blockage (not likely considering it's nature when it happens)
pressure switch or harness ect...
air ingress in oil pickup tube strainer ect...

I'd be getting an oil pressure gauge on it and seeing exactly what pressure you are getting.

No signs of abnormal mechanical noises, ticking or rattling?

hows the performance? thinking turbo
Oil consumption?
Exhaust colour changed?

hard to diagnose this time in the morning,,,need sleep, sorry to hear bud.