||08-23-2009 08:48 PM
I may have experienced this, but what I experienced I assumed was intentional.
If I get hit the requisite number of times the skill lights up. If I then don't get hit for some period of time the skill becomes unavailable. If I get hit once it lights up again for a while. If again I go some period without getting hit it is again unavailable. It sort of sucks to not be able to have one charged, bandage someone and hit it. But it's never too hard to get myself hit once so I can use it.