Recently noticed that the pin on lower house door hinge will rise up about an 1/8” over several openings and closings. When it happens the door becomes slightly out of alignment. Pin is easily pushed back in again but won’t stay but for a couple of cycles. I recently removed and cleaned it, hardened grease but nothing changed.
Contacted PC, had not heard of it before and said the door came as a unit, so I will need to contact the vendor next.
Has anyone else run into any similar issues with the hinges?
Ditto. I noticed it while camping, that the door striker was misaligned. Adjusted it up. The later, its out of alignment AGAIN.

Come to the conclusion that my hinges are loose, and allowing the door to lose alignment. Mine have
bolts through them top and bottom, so different from the
pins you describe.
The pins you describe are similar to door hinges, and Ron D is correct in the assessment that the pin is moving with the 'wrong' part of the hinge.
In residential door hinges, the 'house' (or jamb) side is locked to the pin, and the door side rotates on the pin. USUALLY the house side has 3 spots the pin contacts, and the door has 2, so the house side 'wins' and the pin stays straight. The hinge below is shown with jamb part to the right, door left.

If the pin rotates with the door, often it works its way out. I see it often when 'hinge mount' door stops are installed on a door, but the original pin is used -

MANY times this results in the hinge pin not locking into the jamb side, and rotating with the door. Slowly lifting out until the hinge is not supporting weight, and either the door gets misaligned, or the center hinge gets overloaded and starts to bind. (My dentists office recently had this same problem, with two LARGE doors in the lobby. Noticed it while I was waiting... I showed them how to tap the pins back in, and advised getting the PROPER hinge stops, not the add-ons)
You are having a similar problem it seems, the pin is rotating when it should not. So.... the rotating part must be cleaned and lubed, with maybe a but of cleaning and deburring of the non-fixed part of the pin. And the 'locking' part of the pin must lock again to the fixed part of the hinge.
Any chance of posting a picture of the hinge? Especially when the pin is 'lifted' ?