Drawing a polygon creates an artifact

Hi, I’m trying to draw a path with a curve in it as points in a polygon. Everything works fine until I add the last point.

This is all points except the last one:
image

When the last one is added to complete the path, the path looks correct but there is an additional artifact that moves around when you pan or zoom.

(I hope the images show up)

Is this a known issue?

Hi @Steve_Gomon,

Thanks for bringing this to our attention.

I am unable to find anything indicating this is a known issue at this time.

Do you mind opening a bug report issue in the Cesium github repo? Issues · CesiumGS/cesium · GitHub

Please include as many details as possible including the steps to reproduce.

Thank you,
Luke