Shrinking Bug in TFT

This happens anytime you are killing a 3 star character and shrink them. The character shrinks to a 2 star level with the same amount of HP it has currently so if the 3 star is at 50% and has 400 life and the level 2 has 400 life at 100% the 2 star now has 100 % life.

if you do not kill this shrunken character before the effect wears off the character returns to 3 stars with the same life % total which would now be 800 life.

All i have ever seen this item do is cause lvl 3 opponents to gain huge amounts of life. Lvl 2's seem to be fine when shrunk but lvl 3's gain soo much hp every time.