I'm currently having an issue with this planet as I get constantly harassed by wave after wave of enemies even tho my noise levels are under controll and confined to my base, with no squares reaching outside and even less any of their nests.

Do I not understand how the attack trigger happens or something is broken?

If a nest has a wall within its aggro range then that can happen. It's the same as with Nauvis enemies. Otherwise only pollution attracts them. Are you able to push them back a bit?

They are several chunks away, what is their aggro range?

IDK if it is ok to send links, but here is an image showing my current noise and the nests sending atacks, there are none in the purple range.
https://gyazo.com/31779f0ac26939387109dba5365a6a8c

Just went to those nests north of my factory and shot them down, no more attacks since then.
I really do not know why were they being triggered.

Just went to those nests north of my factory and shot them down, they stopped for a few minutes, now they are back at it.
I really do not know why are they being triggered.

Ok that's weird. The aggro range is rather short. Like one chunk at most. Do you still have a savegame with the nest that you can send me?

Hi, I've sent you a save file on discord.
It may be an issue from some other mod in the stellar horizons pack, but if you can shed any light about the issue it would be great.

I'll close here with the conclusion that it's just what Rampant Fixed does.