We are currently playing Dimension Warp with a lot of modded planets, and on Rubia no special mechanics are working. No trashteroids are spawning, and belts and inserters work as usual.

Rubia relies on lots of scripts running to make everything works. I wouldn't be surprised that some of the change I did with the mod break some of the mechanics in Rubia as well.
Unfortunately, there's nothing I can really do, as it's a bit too big to try to find what's not working (especially as I never played it)