Could you DM me the model or post it here to reproduce it, please? @chamullow. It would be most helpful if you could send the whole placefile and give some details on the platform and hardware you are running from.
I can’t seem to repro the bug just by copying parts with spotlights on them, so more information would be helpful in solving this issue.
By default, outside of Future, we render lights within a radius of the “camera focus”.
The default camera in Playmode has CameraSubject tied to the player character, so light rendering is focused around where the player character is; you can see this focus by checking the Focus CFrame on the camera object. The cutscene then happens far enough from the player character to not get lights to render.
You can fix this by temporarily removing the camera subject from the humanoid and manually setting the focus or using a new camera during your cutscene script.
You can verify this by placing your humanoid player character at around (0, 200, 0). The cutscene will have lights because it’ll be close enough to the focus point.