Involuntary hadath is about the narrow allowance for resumption. The twelve final-sitting cases are about the legal moment at which prayer is considered completed.
Opening interactive controls...
Why involuntary hadath differs from the twelve cases
Hadath during Prayer: Building, Restarting and Twelve Final-Sitting Cases
Involuntary hadath is about the narrow allowance for resumption. The twelve final-sitting cases are about the legal moment at which prayer is considered completed.