Wow, that's an odd one. I don't have time to sort this now but I have filed a bug: https://github.com/espruino/Espruino/issues/913
Hopefully I'll get that fixed today
@Gordon started
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.
Wow, that's an odd one. I don't have time to sort this now but I have filed a bug: https://github.com/espruino/Espruino/issues/913
Hopefully I'll get that fixed today