All I can think is this is a Chrome update - which I'd imagine may end up rolled back soon because it definitely looks like a bug rather than an improvement.
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.
Thanks - good to have a clear comparison @rigrig.
All I can think is this is a Chrome update - which I'd imagine may end up rolled back soon because it definitely looks like a bug rather than an improvement.