What is the ruling if a person praying on a mount intentionally changes direction away from the initial Qiblah?

Primary text

If the animal turns toward the direction of the Ka'bah, the prayer is valid because the Ka'bah is the fundamental standard, and the permission to depart from it was due to necessity. If the person deliberately turns away from the Qiblah to a direction other than the Ka'bah, the prayer is invalidated due to intentional abandonment of the required direction.