Overall the Shadow Leviathan kept aggroing on me without even having me in it's LoS, which, it does not mention it has an ability such as echolocation like say, the reaper leviathan does - which would make this sort of behaviour more correct for the reaper.
I thought it was bugged out but apparently it wasn't and it was the character making the sound cues for when the shadow leviathan attacks your vehicle - and had managed to destroy it, so now i'll have to make a new one with all it's upgrades. So, i parked my prawn suit right outside and went on in to explore the place, as i was looking around the character for whatever ♥♥♥♥♥♥♥ reason was sounding like she was having the time of her life whenever she stepped over an incline. Specifically the shadow leviathan, when i was exploring the fabricator caverns i found the architect room where you combine the AL AN's samples to form his body.