Concrete powder only turns into concrete when falling in lava source block. This is inconsistent with water where it turns into concrete when:
- touching water
- falling in any level of water
The method BlockConcretePowder.onEndFalling(world, pos, state, state) tests if the block is a liquid and turns the powder into concrete. The method BlockConcretePowder.func_192425_e(world, pos, state) only tests if the block is water.