Thanks for reporting this DalzK, this bug will be fixed in the next beta update.
NOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO
It's a feature!
Keep it!
I can't wait to lol when someone dies because they evaded a Sedna's heal(assuming she has one, i'd think she would.)
Not to mention you get attacked much more than you get healed. I see this downside as part of the balance to the evasion. 