Yes, I think there may be some problem when repeatedly writing USB HID code to Espruino (it doesn't happen when I upload normal bits of JS, but recently I've had similar problems when trying to update USB HID code).
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.
Yes, I think there may be some problem when repeatedly writing USB HID code to Espruino (it doesn't happen when I upload normal bits of JS, but recently I've had similar problems when trying to update USB HID code).