I did search and couldn't see anything.

i was doing some auto X today and mid day i lost all the power off my turbos (boost gauge showing ~1.5 psi) i decided to retire my car from the race to save any issues with it, figured it was probably just a bad vacuum line come loose and id drive it home and take a look when i got there. about 5 mins after i left the track my boost kicked back in and started working again. i took a look and all my vacuum lines are on securely and i haven't had any other issues with it since.

any ideas what may have caused this issue?

 

Significant boost loss is typically attributed to a boost leak. Check all the usual places for boost leaks. Even if your precontrol or wastegate solenoid stuck, you should still run off spring pressure which would render your at a 7-5-7 pattern or so. Last thing I would say is your turbos are toast. But like I said that would be the LAST thing I would suspect. Check your couplers and piping. You might find a split.

Matt