According to the Whirlpool service pointer cause of the intermittent Bake burner operation is improper air flow to the burner.
The correction is to replace the Bake burner with the new modified burner and igniter assembly.
- The part number for the burner & igniter assembly is
AP3598752
Here are the break down diagrams for the Whirlpool range
Model SF377PEGB7
Gene.