Geometry Pen Tool Duplicates Bushes On Grid Size 1 & 5

There is an issue occurring when creating brushes with the pen tool at grid size 5 where verticles or the brush shape itself seems to be doubled. This issue also occurs if the grid size is 1, though it does not always reproduce, and does not occur at any other size.

Thi issue does not appear to be a regression

Versions Tested: Issue occurs on all versions Tested
4.17.2 CL - 3658906
4.18.3 CL - 3832480
4.19p6 CL - 3919652
4.20.0 CL - 3879785

1. Create a new project (No template or starter content needed)
2. Select the geometry edit icon and select the pen tool
3. Set the level to top view and set the Grid snap value to 5
4. Click in the level and press the space bar to get the first point for the geometry
5. Create 4 points for the geometry and when all 4 are made press the enter key to create the brush
   Result: when the brush is made there will be two sets of vertices for each point
   Expected Result: When the brush is made there is only one set of vertices