No, it would be true if "production/assembly yielded a configuration different than what was tested."
I expect it was a production/assembly failure -- a failure to secure an engine hose and its clip, which in turn left both dangling in a novel configuration close to an engine heat source.
Quality control is meant to catch one-off incidents of "production/assembly...configuration different than what was tested," which represent a defect escape rather than a problem with "production and assembly," which in industrial engineering usually refers to the wider process, not necessarily the atomic actions therein.
The quality curve in production always shows a spike in one-off problems early. You work hard to minimize these by validating your production processes via low rate production, combined with increased/more detailed quality inspections. What we understand is that Land Rover is experiencing a slower ramp up in production due to COVID, which could impact quality assurance processes that would necessitate more detailed over-the-shoulder inspections in early production runs. This problem will likely affect all vehicles to varying degrees from all manufacturers for vehicles made after about the middle of March, but most likely new or updated models. So beware the Ides of March...and the months following.
If you see something recurring frequently, then it's either a part design or production design issue. If we see this happen a lot, and the *design* is correct, then that would suggest an assembly line error, most likely owing to worker training or tool/instrument calibration vs. anything inherent in the vehicle.
If this happened a lot across many vehicles from the same manufacturer, that would suggest an inherent quality control issue.
So far this is one guy with one vehicle that had one issue.