Striders do not show waddle action for other players (multiplayer)

When I saddle and ride a Strider, (or if I am on the ground) and I'm viewing another player riding his/her strider, the 'waddle' action does not appear. Only my strider will waddle (move side to side).

What I expected was:
BOTH of our Striders should 'waddle' while we ride them.

Please see video link: https://youtu.be/Ta26SqwLVz4