First-person camera randomly stabilized

When using the Sims 4 first-person camera (Shift + Tab), the camera no longer tilts or sways at all. It stays perfectly level and stabilized during every animation (walking, standing, interacting, turning, etc.)

Previously, there was subtle camera tilt/sway that followed the Sim’s movement, which made first-person feel fluid. Now the camera feels completely locked, as if all camera interpolation or tilt has been disabled.

First person itself still works, but the camera no longer responds to any animation with tilt or sway.

I was wondering why that is and how to get it back to being chaotic and unstable?