Currently avatars with dynamic heads have no default animation for sitting and just give blank/empty stares when sitting. A default sitting animation should be implemented, as otherwise each developer would have to manually implement sitting animations, which at the moment i have not seen any examples of developers implementing sitting animations in their experiences. For example, the avatars should look around or blink as they do in most idle animations.
This would help make the avatars look more immersive instead of immersion breaking when sitting.