[2020] Mythic Melee Weapons Heavy Attack Bug

An heavy attack on the Mythic hardware costs 40 energy, I have a heavy attack energy efficiency perk, so it costs only 18 energy, BUT when spamming heavy attacks, if I'm below 40 energy I can't heavy attack no more, I need to wait for my energy to be at least 40 again just like If I didn't have any efficiency perk. When is this bug goign to be fixed u/magyst u/davethebuck ? the same thing happens for the sword. It's been more than 2 months and I'm not the 1st one complaining.