u/Justgooningthrough

I don't know if it's a known issue but the furious strikes perk is bugged. When Furious Strikes refund procs it removes any partial ability regen. This means it is more costly than it appears and can remove a 99% recharged use of the ability. It's not an issue if you use it from 2 charges but that would be the case as there's no partial recharge to lose.