This is my output of the discovery command.
Address | ID | Model
10.0.0.11 | B4E8421C2D5C | AK001-ZJ2145
I was able to debug your code and found that in the SetColor function this line below is causing the issue.
bytesToSend = append(bytesToSend, byte(sum&0xff))
Once I commented that out the lights change color like normally.
Not sure why that doesn't work for my controller, if you need anything else from me feel free to ask.