[GAMEPLAY] Ezreal ultimate scaling bug

In the discription of the skill it says, that it scalles of 100% Bonus AD. I bought Gunblade and pointed the cursor on Ult icon and I saw that the orange (AD) bonus damage numbers are constantly "hopping" from one mesure to another. At the same time it showed either +40(Gunblade AD) or +115 (My total AD at that moment) bonus orange damage, while I was keeping the cursor on the icon.

It`s kinda disturbing, as it messes up your damage output predictions. Thnx.