I did an IA run today and got 5 stacks of the Adaptive Conqueror vision, which increased my damage by 45%, but also my Ultimate costs by 40%. But, as the title said, for some reason the Ultimate costs are extremly overtaxed. I took a screenshot showing the cost of my Werewolf Ultimate. The 40% increase should put it at approximately 420 cost, but as seen in the screenshot, it is increased to 891 ult. I had one single Boundless Potential vision, reducing the cost by 3%. After doing the math, I'm fairly sure that we're talking about a 400% increase (reduced to 397% by Boundless Potential).
I'm pretty sure there are some serious coding mistakes here, unless this is intentional, which would be extremely bad, since this is effectively locking people out of their ults.
I urge you, ZOS, to take a look into this. Everything indicates that there is an extra 0 in the percentage where it should not be.