[Minor] Polyformic Acid Potion

I were doing LFR when I discovered that my "Polyformic Acid Form" Were about to end so I clicked my "Iron Boot Flask" and Died 2 Minutes later,
Then I discovered that my duration got Refreshed to 1Hour and I could store it in the Vial again, making it a fresh 3 hour duration.

Steps;

1. Click Iron Boot Flask (Or Maybe any other Transformations Haven't tried)
2. Die
3. Respawn
4. Store your Vial
5. ??
6.  Profit

If It doesn't work for you it can have something to do with Holy Priest. (Haven't tried with other classes)