You could try manually disabling bluetooth on the device and re-enabling it. I know iOS (and newer Android?) actually cache the Bluetooth services for devices so if you connected to the device previously then the phone might be giving you old info on services?
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.
You could try manually disabling bluetooth on the device and re-enabling it. I know iOS (and newer Android?) actually cache the Bluetooth services for devices so if you connected to the device previously then the phone might be giving you old info on services?