Got this exact same issue on PC.
It feels like the clouds are an additional skybox (within the actual sky - planets, space etc.) and it's attached to the player in some way, causing it to bob with their animation.
I never get motion sickness in games (I'm a virtual reality developer) but I noticed this one and I've just had to take a quick break from the game!
Really hope this gets resolved! Fantastic game otherwise, keep up the hard work Obsidian!