I had an issue when I wanted to generate a contour with GridSize = 50 and set just two levels and using a new package in ClosedLines Takes Too Long, in this case, I couldn’t see all levels.
Note that if I don’t use the new package it shows us all levels which you can see in the screenshot.
I have attached the sample project to share my issue with you.
Screenshot with issue:
Screenshot without issue:
ContourNotAllRangesShowUp.zip (1.9 MB)