T2 LEDs return invalid state often

[johnnyman727]

It appears to happen upon first read:

➜  t2-demo t2 init
➜  t2-demo t2 run index.js
INFO Connecting to Tessel...
INFO Connected to Harold over LAN
INFO Writing index.js to RAM on Harold (3.072 kB)...
INFO Deployed.
INFO Running index.js...
I'm blinking! (Press CTRL + C to stop)
I'm blinking! (Press CTRL + C to stop)
I'm blinking! (Press CTRL + C to stop)
/usr/lib/node/tessel-export.js:765
        throw new Error('Invalid state returned by LED:' + value);
              ^
Error: Invalid state returned by LED:255
    at /usr/lib/node/tessel-export.js:765:15
    at FSReqWrap.readFileAfterClose [as oncomplete] (fs.js:380:3)
INFO Stopping script...