There's sometimes a bit of wobbling at first with the Espruino boards as the RTC and SysTick timers struggle to get in sync. I guess it's possible that it is another issue to do with the 12 byte variables though.
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.
There's sometimes a bit of wobbling at first with the Espruino boards as the RTC and SysTick timers struggle to get in sync. I guess it's possible that it is another issue to do with the 12 byte variables though.