Lingering potions catch fire in lava

When i right clicked to throw the lingering potion into the lava giant "things"of fire popped up where i threw them.(like the fire on a flaming arrow)
The fire also gets smaller as the lingering effect goes away.

What I expected to happen was it would function as normally when it hit the ground

What actually happened was giant "things" of fire

Steps to Reproduce:
1. find or make a pool of lava
2. get any lingering potion
3. throw it into the lava