does MPU6050_DMP module work on Puck?

Mostlikely, your modules has some initialization that has to happen... and you try not to save active things (intervals, timeouts, watches, etc, even though @Gordon did a great job to restore them as good as possible). I'm also a bit puzzled about your use of const and var for the very same thing...

Place 'all active stuff' into a onInit() function - ESPECIALLY with Save on send setting and to avoid (heavy) things getting off on upload (starting heavy things on upload and writing to console in upload - level 0 / directly executed code messes even with the upload to not complete it or preventing Espruino to detect completion of upload. --- I expect this to solve the issues):

I2C1.setup({scl:D2, sda:D1, bitrate:100000});
var MPU, DMOP, iId;
function getData() {
  var data = DMP.getData();
  if(data !== undefined) console.log(data);
}
onInit() {
  MPU = require("MPU6050").connect(I2C1);
  DMP = require("MPU6050_DMP").create(MPU,3);
  iId = setInterval(getData, 1000);
}

You may also be fine with:

I2C1.setup({scl:D2, sda:D1, bitrate:100000});
var mpu, mpuM = require("MPU6050")
  , dmp, dmpM = require("MPU6050_DMP")
  , iId;
function getData() {
  var data = dmp.getData();
  if(data !== undefined) console.log(data);
}
onInit() {
  mpu = mpuM.connect(I2C1);
  dmp = dmpM.create(mpu,3);
  iId = setInterval(getData, 1000);
}