Poor lane markings may seem trivial, but it’s a bit enough problem for Tesla CEO Elon Musk to weigh in, calling the issue “crazy,” after the Tesla Autopilot feature failed to recognize which lane the car was driving in.

“If the lane fades, all hell breaks loose,” Christoph Mertz, a research scientist at Carnegie Mellon University, told Reuters. “But cars have to handle these weird circumstances and have three different ways of doing things in case one fails.”