Walking Calamity & Rageforged II bug - Spends 10 rage every millisecond

Bug Report ID: #3210829243

When activating Walking Calamity with the Rageforged II support, along with Eternal Rage and Furious Wellspring, the support gem spends 10 rage every millisecond while Walking Calamity is active.

I'm guessing this is a bug, unintended function.

It doesn't increase damage either for each time it uses the support gem, so basically it spends 10 rage over and over again.

Video showing https://youtu.be/Er7naHc4SDY