I'm not sure if I'm the only one noticed this, or I'm not sure if this is intended. When I receive speed Infusion buff on my hero, and I stand in one location to use brandish continuously with Stance (Zak or krex for an example); the SI effect will go away (back to original attack speed without SI but with booster even though it is no where near the anti spam/bot threshold) after maybe a minute even though the SI did not expire. To get SI effect back I had to move a little similarly to reactivate anti spam/bot feature where it stops you from attacking.