G1000 Display reflects light with reversionary mode logic

Hopefully maybe someone in here have a Idea how to solve this problem.
I solved the Issue that the G1000 are not working in reversionary mode in the C208B, but with that changes the displays have something like a reflection from cabin or sun light. I only added the same logic which is in use in other aircraft.
I don’t know where something like a reflection is defined. Any Idea?

Looks like this if only left cabin light is on. On the left site it reflects and on the right it doesn’t reflect.