When a player is using TrackIR, there is an ongoing centering issue between it and Freelook / Mouselook.
Getting into vehicles, including the helicopter, sometimes results in the players view getting stuck in a freelook view off to the side or over the shoulder. ALT (recenter) sometimes fixes it, but it will happen again. The same applies for the following..

Repairing. The view will SNAP to an off center Freelook view, most of the time breaking the link to the repair.

Digging. Same as above. View will sometime SNAP to the off center Freelook view.

Climbing ladders, vaulting, driving a wheel vehicle, where Freelook becomes automatically active, results in an off center free look state. That may not be apparent until the player goes to repair or build, at which time it SNAPs to that off center view.

Exiting a vehicle that is on a certain slope between level and about 10 -15 degrees, where the driving exits on the up or downhill of that slope, results in a freelook / trackir center difference.

No images or videos, as this has been reported twice. Go look at the other reports after you mark this one "Awaiting Internal Testing" and whoever is supposed to be handling TrackIR related issues needs to get off their ###, maybe stop making racing cars, and fix it.