Refreshing the position of an animation?

I have a poseball that is part of a linkset, but only a child prim. When I move the poseball within the linkset, the avatar sitting on it doesn't change its position. Even when a new animation is started, the avatar stays at the old poseball position.

Is there any way to refresh the animation or the sit target?

Alternatively, would it somehow be possible to change the sit target in a way that has an effect on the avatar currently sitting on the prim?

Sit Targets only apply the next time they are used, i.e. They are only used to initialise the position.

You could try moving the avatar as they are considered just another prim

To add to Newgate's comment, when a player sits upon an object they are added to the linked list as the last object in the link. So you can move them around at will by referencing their link ID (which is equal to the number of links in the list).

The moving_end event will fire when an object has finished being moved, but the capture and change in rotation you have to use a timer.