Thanks for your answer, unfortunately asteroids don't deal 400+ damage to any other entity, ie inserters for example only take 50 damage from a full medium asteroid. There is a clear difference, hence I do believe there is a bug. It was no understatement when I said the walls are getting one shot...

It seems stone walls take more damage from asteroids than other structures in space!

I have parked my space platform around Fulgora, and there are a few walls in the front, but also a lot of repair packs in the hub.
Unfortunately, it seems my walls get "one-shot", along with the foundations under ...

I am playing modded factorio with the ruins mod, and found an artillery turret pretty early : firing an artillery ammo triggered an attack (as expected) but gave me the achievement for triggering an attack by pollution, which I definitely did not do.

I'm sorry I don't have any attachments since it ...