RobotStudio event

Problem with PhysicsControl SC block

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Hey,
not sure wheter problem I got is because I do something wrong or it's  a bug. I have created simple SC which is supposed to sense an object and change its behavior to dynamic. However when acivated not only does it leave a behavior of the object as it was but also it changes the behavior property of the PhysicsControl block to a behavior of the the object.

Short clip ilustrates my problem:

Thanks