Fire has lost all texture is now just a black and white shape

What I expected to happen was...:
The fire to burn its usual orange yellow colour

*What actually happened
Fire broke out so exited game and restarted device once I entered the game after device had been restarted fire was still burning but was now black and white texture (won't change back still like this now after multiple restarts and even deleting the map and creating a new one)
Steps to Reproduce:
1. Creat a fire using lava (I placed lava beside wool)
2. When fire has caught exit app and turn off device
3. Turn on device again and go onto app again same map as fire was on and fire will change