Can you try adding -b 9600 to the command-line? It'll force a much slower baud rate, which might help?
-b 9600
I can't say I've ever come across this problem before. Perhaps you could try another computer?
@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.
Can you try adding
-b 9600
to the command-line? It'll force a much slower baud rate, which might help?I can't say I've ever come across this problem before. Perhaps you could try another computer?