Shield Charge not working properly with Giant's Blood

Hi I found a bug where I cannot use the Shield Charge skill with a two-handed mace in my main hand, and a shield in my off hand. I'm using the Giant's blood keystone, so that lets me have things in my offhand, like either another two handed weapon mace or a shield. I've tested moving the shield to my 2nd weapon set, and the skill gem works fine at that point. I'm happy to provide more evidence if necessary!

+1
I also encountered this bug. Sometimes the fix is to unequip and re-equip Shield Charge, in which it re-enables the skill, but only for a few uses.