My blue light filter turns itself on

At about 9 P.M. every day my Galaxy S7 Edge turns the blue light filter on and keeps it on until the next morning. It started when I turned on "Turn on as scheduled". It follows the time I set it to, but keeps turning on despite me having turn the setting down. I have turned off all the blue filter settings and they remain stating that they are off, but the effect still occurs. I can't find anything else about this and it's getting a little annoying. Please help

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