Oh, that's a very specific crack. This is an extrusion error. The extrusion temperature is dropping too low while it's still over the internal die. The thicker peaks cool more slowly than the thinner flats, remaining at a weaker temperature longer, and they're pulled apart by accumulating contraction.
These cracks usually aren't obvious until they meet a conflicting load. For example, tapping threads up the end without supporting the work correctly. It's not like this is a load bearing part, they could get around this issue with a little care. Holding the work in a hex collet during tapping is cheap, adds efficiency, and would solve the problem. Sending feedback to the extruder is free and usually effective. Or maybe the product is moving well enough on brand equity that it's not worth bothering.
Autonomous programming will be explored. Potentially, Copilot is a proof of concept, an early step in that direction. If it is, the corrections made by Copilot users will be applied to the development of the future of unattended programming. Whether it is or not, it's close enough that any legal outcomes experienced by Copilot users will contribute to the definition of liability boundaries relevant to the future of autonomous programming. Copilot users are numerous enough that the incidence of risk is low of ending up under the foot of a copyright owner with the means and will to crush a user, but no one should take such a risk to use a novelty like Copilot in production code.
These cracks usually aren't obvious until they meet a conflicting load. For example, tapping threads up the end without supporting the work correctly. It's not like this is a load bearing part, they could get around this issue with a little care. Holding the work in a hex collet during tapping is cheap, adds efficiency, and would solve the problem. Sending feedback to the extruder is free and usually effective. Or maybe the product is moving well enough on brand equity that it's not worth bothering.