Spray gun setting are off, too heavy an application surface is not clean/prepped as well as it could be and mix the paint bottle for 10 minutes before mixing and another 10 minute after mixing. Never too much mixing! Go back to the Cerakote manual and/or video and on a sheet of paper or a sheet of cardboard test your settings for air pressure, the fan pattern and ensure you have a comfortable trigger adjustment so you don't feel like pulling back more than 3 inches.
I find that is usually less of a challenge, but I am currently trying to paint as little as possible with such crappy air swirling around. Can’t go wrong shaking the bottle to death.