Grizzly Rage Damage Multiplier BUG

Good afternoon, I encountered a problem with Grizzly Rage, namely the multiplicative bonus to damage. The point is this, the description clearly states that when shapeshifting, the player receives a x20% multiplier and x3% every second, if the first multiplier multiplies correctly, then the multiplicative every second bonus increases incorrectly by approximately ~1.1% every second, this has been verified more than once.
I hope this gets fixed very soon.