Well.. It seems that the Heal Character isn't always working like a charm.. Sometimes it works.. sometimes it doesn't..
Tested it by letting myself get beat up on different levels.. In some cases the bar doesn't refill when more damage is taken..
[edit] Okay.. One step further.. Seems like in a Bossfight the healthbar of the Boss got refilled instead of the Player's healthbar.. Gonna test this some more.. Will post results later.
[edit2] Yep.. When in a Bossfight the healthbar of the Boss gets refilled instead of the Player's healthbar..