Just tried it here and it still works fine on 1v62.
Honestly not sure what to suggest. I used 1v62, copied the code from that page exactly and plugged my RGB123 in exactly as you did and it worked perfectly.
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
Just tried it here and it still works fine on 1v62.
Honestly not sure what to suggest. I used 1v62, copied the code from that page exactly and plugged my RGB123 in exactly as you did and it worked perfectly.