Brief explanation of issue:
The infinite water bucket can be used to place water in the nether, and i don't think that's an intended feature
Steps to reproduce:

Step 1 Use the infinite water bucket in the nether

Step 2 Observe the water in the nether

YeOldeTanks version: 1.10,2-2.0.2 (2.0.2)

Minecraft version: 1.10.2