Hybris Synchronization calling prepareInterceptor too many times

Hi. I wrote a ProductPrepareInterceptor to always run a logic before save product to set a property called "sellable" to true or false depending on it's other properties value.

But when i run the Synchronization of just one product, it calls my interceptor 36 times, always with the same properties in the object.

So my question is: Is this behavior normal? Why the synchronization call the save() function to the same object so many times?