Barb Whirlwind + stomp = Huge Damage Difference Bug? Season 5

Hi there, ive noticed a bug today on barbarian whilrwind + stomp.

Even tho stomp is on cooldown if u spam the key that is for stomp skill it makes 2/3 times more whirlwinds than normally which makes a way more damage and a faster way to kill enemies, especially bosses.

I made a test, how long i will do bosses and with that trick its done much faster.

Please fix this.