There is already a thread here called “Slaying Potions, the double-edged sword” with 25k views which issued the same thing. Arenanet has responded once 2 months ago but have been silent ever since.
Also, please do not see this as a minor thing. A lot of people are unaware of this bug.
These are typically used when people expect a challenge. And wiping because you took precautions against wiping is painful…