The red color can't work on one of my bedside lamps

I have two bedside lamp . But one of them can’t work well. When I choose the red color , the lamp can’t show anything , when I choose the green , the lamp show the warm yellow color, when I choose the bule, the lamp can show out the bule correctly. I had try to reset the lamp ,but it doesn’t have any help. , How can I solve this question ? I had made a video about the problem.

There is sth. wrong with your light. Please contact the reseller.