Level issues with VolumetricCloud

So about a week ago VolumetricCloud’s started acting funny, they went from the normal white to black & have stayed this why ever since. Ive checked the defualt BP via copying it to see if anything had changed but nothing seems to have. Ive also deleted / uninstalled evrything to do with UE4/EPL & this issue still seems to be present… If any one has a clue of how to fix this issue please let me know.