I’ve encountered this issue today when working with my project.
If you set the CameraType to Scriptable, the player is be able to use alignment keys (< and >) to rotate their camera, even though the camera is intended to be fixed in one place.
Are you testing in studio? I’m pretty sure roblox removed that feature a while back and instead started to replace it with other features (like the emote system). Try testing in a live server and see if the results are still the same.