Shifting exposure in drone video clip

I have a drone video clip from our golf course i'm using for a video course guide for our homepage.

Unfortunately the exposure is shifting several times. I have tried using the guides i can find online, and can somewhat produce a much better looking clip than the original - but i find the colors are still shifting - i'm finding it hard to tune in the color corrections on each keyframe so that the results are looking the same throughout the clip.

Any good advice? Here you can see the clip:  

Unfortunately that is what often happens with automatic white balance. Higher-end cameras have adjustments for how rapidly auto white balance changes, called "shockless white balance". 

To avoid this it's often best to shoot with fixed white balance. A typical number for outdoors is 5600 Kelvin.

There is no automatic way to fix the current problem. You will have to manually keyframe it. Monitoring the vector scope can help give a visual guide.

This Larry Jordan video shows how to keyframe color corrections. The overall goal is use the fewest # of keyframes possible, relying on FCP to blend them together. It can take some trial and error.

"Larry Jordan Training #242 - KeyFraming Color Correction in Final Cut Pro X 10.4":