Shouldn't the brown fall or am I just completely missing something.

[Jeremy5909]

The brown falls when its by itself but when it's grouped with other colors it doesnt

json: https://pastebin.com/PCNxfAzc

[MostLongestName]

This happened to me one time with water, if you seperate it and make it a new rule, it should work. Otherwise, write the rules down and remake it.