Do you have the same issue if you follow the OP’s steps to reproduce it?
Provide extra information to complete the original description of the issue:
I had this last night and figured it out this morning. The taxi lights are also bound to my Alpha yoke. When the taxi lights are toggled on via the yoke it shines through the pedestal into the cockpit. When I turned it off on the yoke it goes away. Turning the light on and off with the overhead panel toggle didn’t shine into the cockpit.
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