I have some trouble understanding the nature of the problem.
If you mean that changing between views looks "jumpy" and "jittery", then yes, it happens and i would call that a glitch. It's relatively minor, but still a bug.
If you mean that the view angles are limited when you are in gunsight view, that one is not a bug but an intended feature.
It's meant to simulate tightening your seatbelt and it has advantages and disadvantages:
+ less shaking around in the cockpit, so your viewpoint is steadier and you can aim with more precision
- decreased ability to look around because your body is tightly strapped to the seat across your shoulders.
That one is not a bug and if head movement speeds are also somehow capped, then i'm all the more pleased. Stublerone says it's a bug but i call it a deliberate feature: it might need some work, but it's meant to make things more realistic.
Maybe it should be an option in the difficulty settings ("realistic pilot movement limitations" or something like that) so both of us could be happy. Cheers