Try running the job at a lower power setting and see if it makes it all the way through.
We’ve seen a lot of disconnection issues with Ortur machines and I’m not sure why they are so much more sensitive than anything else we support.
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Use a good quality, shielded USB cable, preferably with a ferrite ring at one end at least
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Make sure the USB connection is secure on both ends, not loose
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Make sure the power supply is sufficient to supply the laser.
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Ground the frame of the machine - one user found that the X belt was generating significant static electricity when running back and forth (engraving) and the discharge was resetting the controller.