Issue with Small “Cracks” or Gaps in GroundPrimitive 2D on Mobile.

We’re seeing tiny gaps or “zipper” cracks in our GroundPrimitive-based 2D overlays on our Ionic React + Cesium mobile app. The same assets render perfectly on the web build (LiteJs + CesiumJS). An example screenshot is attached. Please advise on how to eliminate these artifacts on mobile.