When I try to use my bucket to get lava, it won't let put it in my bucket. only water

Put the summary of the bug you're having here
when I try to use my bucket to get lava, it won't let put it in my bucket. only water
What I expected to happen was...:
Describe what you thought should happen here
for lava to be in my bucket.

What actually happened was...:
Describe what happened here
I got set on fire.

Steps to Reproduce:
1. make a bucket
2. ... go to Lava
3. ... Try to scoop it up
(seed is nyan)