Hi Steven,
interesting, thanks for sharing!
In the not-stacked set you have 203 images vs. 27 in the stacked one.
Did you put all the source images for stacking into the non-stacked one? Because photogrammetry doesn’t like it at all if there is more than one camera in more or less the same spot.
If yes, it would be great if you could try again with only one image per camera position.