Since you don't believe me... here's a video:
The video is unlisted. As I said, this is a minor flaw, but since the first 24 strips update colors immediately and the last 8 don't, it must clearly be a bug. At first the light glare in the video doesn't let you see the colors, but you see that each time I switch back and forth between AUX inputs and channels, you see the SELECT led button change color.
The firmware is up to date, version 2.3.16845.