Answer from Wolfdog at [ Ссылка ]
This is because you're continuously baking the lighting. Don't worry, as this will be changed automatically once you build the final game.
To fix it in the Editor, go to Window - Lighting - Lightmap Tab - Disable Continuous Baking - Press Build to bake the lighting.
Note that if you add more lights or make some changes, you have to bake the lightmap again.
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