Link to video showing bug: 

 

Could that be a controller dead zone issue? Some sticks over time can develop "stick drift" that games can perceive as movement input even when you're not touching them. Try increasing the dead zone inner numbers in Outer Worlds 2's settings. I find 24% gives a safe margin.

I'm having this issue too, except it's the other stick (camera). Occasionally, the camera will start drifting in a random direction. I know this can't be my analog stick because: a. the controller is brand new (Flydigi Apex 5), b. it doesn't happen in any other game (in Rocket League for instance, my deadzone is 0 and even the tiniest movement in any direction with that stick is perfect), c. it even happens when using my controller's gyro aim (which also doesn't happen in any other game, and doesn't even make sense to have drift). The drift disappears when I turn the controller off and on, but reappears shortly after. This definitely has to be a software bug of some sort, most likely with OW2.