A little bit of bad code caused a hilariously unfortunate crash. https://www.thedrive.com/news/37366/why-that-autonomous-race-car-crashed-straight-into-a-wall
The engineer confirmed that the vehicle telemetry reported back the invalid data, however, it was not flagged as being invalid and was missed by the vehicle operators.
The old divide by zero problem, NaN, PILOT ERROR!!! RECALCULATING!