Interestingly @shellbeezy We were having issues where Square as the Source of Record was randomly not syncing inventory from Square Since the Update. We just went back to 1.038 on a hunch and per your instructions above and everything is syncing again perfectly. We could never identify why one product would sync vs another but the 1.038 syncs perfectly.
We did try removing SKUs changing stock levels etc but could not find anything to say one way or the other. Whatever I can do to assist or information I can get you let me know.