I have a static animation on a humanoid that locks them into the Idle Pose. I have the "Auto Steps on 3 and 4 point tracking" disabled and the "Force Locomotion Animation on 6 Point Tracking" disabled.
When standing still, one leg twists out away from the intended animation.
Once I start moving, this goes away.
Here is the public avatar that you can try out. There is a toggle in the menu to disable the animation.
I've confirmed this happens in 3 point tracking and Desktop mode. When 6 Point tracking is available, this issue doesn't happen because your legs take over the movement.
The reason this is important is because I have a full quadruped latched on top of this. The humanoid needs to be mostly static (to reduce jitter), but still be able to be used with tracking. As such, I lock it into a single static animation. Whenever tracking is available, it takes over and my system follows it.

Photo Viewer

View photos in a modal