Sometimes when you start up the game the camera will be stuck somewhere (e.g. between the two connected pieces of Yzmir) and you need to walk around and jump for a while to get it to return to Piri. Also, sometimes (more rarely) you can't control the camera while accelerating in a vehicle or walking, so you need to let go of the W/A/S/D keys to turn the view with the mouse. I don't know of any specific way to replicate these on demand. This is how the camera was when the game started.
The camera is kind of buggy right now....thats probably my biggest complaint for the game is the camera bugs
Yeah, camera having a colision model, getting stuck in stuff, it's a known thing. btw it's also possible to get the camera stuck in something like the mon place and walk Piri away from it. I did also notice the movement thing, to some extend. Somtimes she just keeps walking left or right and I have to turn with first person or let go of all buttons for a second. But as you said, is hard to replicate or point out clearly what the problem is.