I have not changed anything in the tune, so unless it reprogrammed itself, it should still be set for closed loop. Plus it was working fine before the issues all started.
It's happened to me! It's rare, but it's worth checking your prom to see if it matches your calibration.

Not sure if anyone else has a vehicle that uses that style, but figured if you did, here is a decent price on them.
That's a crazy low price. Hopefully it's the real deal.