Came across a couple of things to try.
- Try setting the light to stationary or movable so dynamic lighting is used and see if that helps. Stationary is better as static items can be baked then.
- In the Project Settings, go to Rendering and then to Default settings and turn off the Auto Exposure and see if that helps as well.
I have no idea if these will help but might help track down the cause of the lighting issues.