No colour wheel

Installed version: WLED 0.15.0
ESP02
(esp8266 build 2412100)

I have 4 WLED strip lights. 3 are working fine but the 4th isn’t. It doesn’t have a colour wheel and I can’t work out why it’s different from the other 3.
Please advise.
TIA
John

It can be enabled/disabled in the UI settings.