Light Randomly Changing in Scene

The lighting in my scene is changing randomly. If I tab in and out of Unreal, it changes intensity randomly. If I have Unreal open, it changes over time. It’s like auto exposure, but I have auto exposure min max at 1/1 on a global post process and I have auto exposure disabled for the project, so I have no idea where this could be coming from. Any ideas?

delete the light.
recreate.

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