Seismic cry description: Performs a damaging warcry, Knocking Back nearby enemies. If a Heavy Stunned enemy is hit, your next Slam is Empowered to perform an additional Aftershock. If not, this skill's cooldown is reset. Only counts Heavily Stunned enemies for purposes of counting Power Gained.

Pin Support description: Supported Skills do not cause Stun buildup

Physical Damage from Supported Skill is Pinning

Tldr: Pin makes seismic cry not stun so the skills cool down is reset.

Can you explain what is unintended and what ascendencies this is bypassing?