Phantom Fires

I was using a flint and steel to burn down a forest in creative and when I applied water over the area I would have patches of the ground that had no visible fire but gave you the burning affect. It also happened beside trees that had been put out and randomly in the air. When I tried to resolve is by putting it out, the game glitched with the purple/black error blocks and my game crashed. I only could get a screen cap of the glitched inventory before my game crashed