How do I stop my control rigs dissappearing and the mannaequin returning to it's original size when sized down?

Hey there, I’m new to unreal and am struggling with this.

I’m trying to make a simple animation using the CR_Mannequin body in unreal, however whenever I restart unreal the control rigs disappear and I lose access to the animation. All I have left is the mannequin model with no rig controls. This is very frustrating as I lose my work every time I re open unreal.

Also, even though i size down the mannequin when I reopen unreal it returns to it’s original size. How do I keep it one size permanently or is this not possible? Cheers