Taking lava or powder snow from a cauldron increases the wrong statistic

When powder snow or lava are removed from a cauldron, the "Water taken from cauldron" statistic increases despite the fluid in question not being water.

Steps to replicate:

1. Make a new world to ensure statistics are 0
2. Place a cauldron
3. Place lava and/or powder snow in the cauldron
4. Remove the fluid from the cauldron with an empty bucket
5. Check statistics

Expected result: The "Water taken from cauldron" statistic will show 0 as no water was taken from a cauldron

Actual result: The statistic increases and shows whatever number of times you removed ANY fluid from a cauldron