Could be related to the order of the points being sent.
Try dropping the last half of the points and see if that fixes it. If not, drop the first half; if it fixed it try dropping the last quarter.
That will allow you to more quickly zone in on the problematic point(s).
Double checking your working range may also help. Are the units in feet? Meters? Inches? How many decimal places do you need? If this is a working range issue the geometry will usually ‘jump’ or ‘dance’ when you navigate the 3D preview.