Auto attack - attack speed

[Cerberpat]

Hello,
I play as Illusion knight with agi build and near max attack speed... but with auto attack on my character attack like 2x slower then if I just hold my right mouse button then i can attack with full speed.
So when I am using auto attack my character is getting 2x weaker
It`s auto attack buged or I can change any setting to fix it?