(a) In a county in which there is a statutory probate court, the statutory probate court has exclusive jurisdiction of all guardianship proceedings, regardless of whether contested or uncontested.
(b) A cause of action related to a guardianship proceeding of which the statutory probate court has exclusive jurisdiction as provided by Subsection (a) must be brought in the statutory probate court unless the jurisdiction of the statutory probate court is concurrent with the jurisdiction of a district court as provided by Section 1022.006 or with the jurisdiction of any other court.