So, for most asteroid spirals such as the one in the image, the center of the spiral is broken and the asteroids will shift from where they are, to much closer to the sun, and continue as normal until they reach the end and despawn.

Are they strangely intended to have duel spirals or is this actually a bug?

I think its a bug cause I've seen that in snake hole sometimes...

Where is that please?

The ones in Snake Hole do this sometimes. The key level.

But that's instanced, iirc. It's not particularly helpful if it's only "sometimes", either. I want to know where the one in the screenshot is.

The asteroid part of Snake Hole is not instanced. It is the second room.

Oh sorry, it's in Fly Times, in Nexus.

There's also several other instances of this happening, here's a list:





For Brigand's Stronghold, upon entering the ring will look like the image above, but as the asteroids disappear and new ones appear, it goes back to a normal spiral, and a few seconds after all asteroids are normal, it snaps back into what the image looks like and remains that way.

I'm sure there are a few more like XYZ and that biologique place but I doubt I can get a screenshot since they're being mined.