Normally, a jurisdiction dispute doesn't really involve the opposing party. It just requires the court to issue a ruling on whether the case should be handled by the current court or transferred.
However, in practice, for various reasons, some local judges handling the case may choose to communicate with the opposing party, listening to their opinions.
It's nothing more than the fact that jurisdiction, while simple to talk about, is incredibly complicated in practice. Legal applicability is just one of many factors.
Take one previous case as an example: the defendant raised an objection to jurisdiction, and the filing court ruled to transfer the case. But then a problem arose—the receiving court refused to accept the case, claiming it should still be under the original court's jurisdiction.
