Part of hue light strip a different colour

I have the Hue Ambient Light Strip (white and colour) on the back on my TV. It’s about 2 months old and all lf a sudden, the end of the strip has started displaying a different colour to the rest of the strip - see photo.

I find that if I unplug at the power and then plug it back in it resets it, but an hour or so later, the problem comes back.

Anyone know why this is happening?