the feature for the call of slayer foundation of the warrior lets you add dice to the pool, and select how many dice you will use. when you select the dice to use, a UI button shows up to subtract from your die pool, but it remains grayed out and unusable.
by comparison, many other abilities that work similarly do let you remove their tokens through a UI button correctly.
call of slayer:
Fane of Wilds, for comparison:
