Hi and duburlan,
I took another look at this issue, and there does appear to be something unusual happening. When I dragged the Test1 widget around in the viewport, the PropertyChangedEvent.Property was NULL, but if I entered new X, Y, or Z values for Test1 directly into the Details panel, then PropertyChangedEvent.Property appeared to have a valid value. This was also only occurring when I was simulating in the viewport. I have updated the report that submitted with the new information I observed that should help with the investigation.
Also, just to provide some additional clarification, PostEditMove won’t work in this case because that is only called when the entire object is moved in the scene. PostEditChangeProperty is called when only the values for Test1 are changed. I am guessing that when the suggestion to try PostEditMove was given to , it was based on a misunderstanding of what was being moved.