Rigid body weird problem

Hello everyone,
I have weird problem with rigid body. I have simple animation. Baseball smashing a coffe cup. Coffe cup gone thru cell fracture. Baseball bat have rigid body active animation and coffe cup have rigid body deactivation and start deactivation checked to simulate bat breaking cup. And now, coffe cup falls apart when bat moves to hit, it doesn’t stay in its form… But when I move cup “outside bat hit area” everything works just fine. I don’t know why.

Here is my blend file.

Zadanie2.blend (3.9 MB)

Thanks in advance.

Mario