MeshLine.advance() artifacts

[brianjacobs-natgeo]

Hi, In the advance() demo (https://www.clicktorelease.com/code/THREE.MeshLine/demo/birds.html), and independently in my code, there are artifacts in a meshline's tail when using advance(). It's as if the end of the tail isn't being removed sequentially. See the circled parts here, where the line becomes discontinuous:

Know what might be causing this?

[Axiverse]

Without antialiasing, lines with width < 1 pixel may or may not be consistently visible. This seems to be the case here.