In a Visio file, I want to set up a XY positioning grid to position shapes dynamically.
The 0,0 and 10,10 markers are using red shapes (the grid is there just for testing):

These shapes have very simple shape data:

If I look at this Visio drawing in Cube, the 10,10 marker is not visible, but the 0,0 marker is:

I like how the marker is visible in Visio (it's clear when editing the Visio drawing), but not in Cube.

Why is there a difference in behavior for the 2 markers?
Is there a way to make the 0,0 marker invisible in Cube (but still see it in Visio)?