The article seems deliberately geared to make you think it was one of the humanoid Robots.

Given the fact it was used in the production of automobiles. It likely was a Robotic Arm. Apparently the staff didn’t make sure it was properly shut down with the other arms in the area.

It does raise questions about the speed of integration and upgrades. It took a couple decades if not longer. For Robots to initially make their appearance and have their kinks and safety problems worked out before they hit mainstream production lines for the Automakers and factories.

The newest advances. Are having a minuscule fraction of the time before they integrate them sometimes measured in mere months. Coincidentally coinciding with the comparative lightning pace of and integration of advances the past few years in Robots. Accidents are increasing.