But I do recall the Range Alt indicating an altitude of ~45,000 ft when I begin PDI.
That's a bit low, but shouldn't be a big issue.
But I'm starting to suspect a bug with my save state.
I can check your scenario for any issues if you want. The scenario files are too large to be attached to a post here in the forum, so you would need to upload it externally somewhere.
---------- Post added at 21:58 ---------- Previous post was at 16:40 ----------
Ok, I did an initial check of the scenario you sent me. I'm already seeing multiple things going on. I can't load the scenario without deleting the S-IVB from it. Did you delete most of the S-IVB scenario lines manually? And which NASSP and Orbiter versions are you using?
The biggest issue I am quickly seeing is that the AGC clock is off by nearly 2 minutes (check V16 N65). That can quickly lead to the state vector deteriorating and in consequence the LM crashing.