About GSFSC Resolution curve in Non-uniform Refinement job

3D Refinement
#1

The curve drops off between 12A and 5A. It seems strange. What does this mean? What can I know from this curve?

Screen Shot 2021-08-31 at 10.33.19 AM

#2

This curve is an usual one. There is no drop.
Screen Shot 2021-08-31 at 10.33.04 AM

#3

Please see relevant discussion here.