Last 6 led aren't not glowing for RED color

Facing issue with my Yeelight Strip after using 3 months, last 6 red led of the strip not glowing but green and blue are working. While I’m setting red color last 6 led of the strip turns off and for green and blue color it glows.

Contact the retailer you bought the goods from and tell it about the problem.

Bought from online platform amazon.in