It's unclear what happened, if this would happen to anyone without my mod list but for me on nauvis the remants of cryogenic plants and more seems to spawn. I am unsure of how exactly the remants spawning system works in factorio so I cannot provide much more help but it seems that when a mod changes the name of nauvis, the remnants spawn there.

I have for reasons of trolling my friends gotten the femboy mod and it changes the name of nauvis and it seems to me at this moment that that would be the cause of this weird spawning.

I do not see any Rubia decoratives or minable entities in my game with Rubia installed. This is almost certainly caused by a separate mod messing with the mapgen settings of Nauvis' planet.lua file.

Please confirm on a separate save so I can close this out.

Give me a second, I narrowed it down to either the ruins mod or the alines biome mod

It's alien biomes. It seems that because of how they change the tiles of nauvis, they somehow make the rubia trash spawn on it

It's kinda shocking no one reported this before me cause alien biomes is a damn popular mod.

I have reproduced the bug, but I do not know enough about how alien biomes works to stop it. Earandel (the owner of Alien biomes) is out sick, and can't answer questions. I'm going to do some digging on this, but know it may take a bit.

Me and my friends have this problem too, thanks for trying to find a solution!

No worries, just like the mod, like the idea so I'm trying to support in the ways of bug reporting. I enjoy pushing stuff to it's limits so I find some very spectacular bugs from time to time

I think I figured out a solution. However, I need to more thoroughly test this before I can put it out.

I solved the problem. It is uploaded to the mod portal as 0.69.25. I also added an emergency failsafe function for you guys to un-fuck your save files from garbage that was spawned onto nauvis' surface, coded just for you. Please use the following console command in the save file that is polluted with rubia garbage on nauvis:

/c __rubia__ rubia.emergency_failsafes.clear_rubia_entities_from_nauvis()

It workerd! Thank you very much! :D