It’s probably something like the story within the story For the Benefit of Mankind by Liu Cixin.

Such as?

Spontaneous ideas for troubleshooting:

• Disable the stepper motors, slide the head to the position it would be in when printing this section, and check for any irregularities in the rail or belt.
• Clean the hotend.
• Try to print the part again, see if there is damage at the same section.