Lingering potion with huge fire in lava

A big fire shows up when i trow any Lingering potion in the lava

What I expected to happen was
i'll just trow a fire Lingering potion in the lava and test if i get the potion effect before i'm getting hurt from fire damage*

What actually happened was...:
there appeared a huge fire that slowly become smaller. You can see how long it takes before the potion stops. fire gone=potion gone

Steps to Reproduce:
1. Make a lavapool: 3x3 and 1 deep
2. Take any Lingering potion and trow it in the lava
3. You'll see a huge fire that is slowly become smaller