Rage loss not prevented by being hit unless you have rage already

As the title says rage loss is not prevented by being hit unless you already have rage.

Setup:
- 150 mana regen per second
- Allocate Chainbreaker for 6 rage regenerated per second.
- Do not get hit in last 2 seconds; no rage gen as expected. Loss of 10/s exceeds gain of 6/s
- Get hit by an enemy in the last 2 seconds; no rage gained. Not expected. Should be a gain of 6/s.
- Equip ring with 100% mana regeneration rate, enough to get 12 rage per second. Character regenerates at the expected 2/s.
- Get hit by an enemy and the character gains at the expected 12/s.
- Unequip ring, going back down to 6 rage gained/s. Continue getting hit, and continue gaining at 6 rage/s (as expected).

To summarise the only scenario not behaving as expected, is having been hit recently, with 0 current rage, and not gaining 6 rage/s.