Gap between globe and glow

[gmmakqa]

I can see a gap between the edge of the globe and the glow. It looks like a black outline around the edge of the globe, but that is just the background colour showing through.

I verified this by adding a black glow to the gradient background example on https://react-globe.netlify.app/usage/globe. You can clearly see the outline peeking through between the globe and the glow.

I thought maybe the three-glow-mesh library was to blame, but the versions are up to date, and the globe example for that lib the problem isn't present: https://codesandbox.io/s/y6vmj. And looking at the source code, the method being used to add the globe mesh is almost identical to this sandbox example. So I'm at a bit of a loss.

Any ideas what might be happening?