Contradiction with Numbers 26:48-49
These verses list different descendants of Naphtali, which do not mention Jahzeel specifically as Genesis 46:23 does.
Numbers 26:48-49: [Of] the sons of Naphtali after their families: of Jahzeel, the family of the Jahzeelites: of Guni, the family of the Gunites:
Contradiction with 1 Chronicles 7:13
In this verse, the descendants of Naphtali are listed without including Jahzeel, contradicting the mention in Genesis 46:23.
1 Chronicles 7:13: The sons of Naphtali; Jahziel, and Guni, and Jezer, and Shallum, the sons of Bilhah.