But no mention of an update that might improve calibration here: https://glowforge.com/latest-improvements
It is a crazy situation people wondering around in the dark trying to work out if they have fixed a problem themselves or GF have changed something. And no indication from support what bugs there are in the calibration routine. All they say is put the head under the camera. Some people say that always works, some people say it always fails and you need to put it in the park position.
Some times it is too much light, some times too little light. Sometimes a square cutout on the bed throws it off, or does it? Nobody knows a definitive way to make it home reliably. Some people never have a problem.
Now if this was a proper software project there would be a list of bugs and proper release notes and all this uncertainty and confusion would go away. I am sure GF staff know exactly why the calibration fails but they never let on.