Tesla pulls its Full Self-Driving beta due to software 'issues'

The setback comes as Tesla is under regulatory scrutiny over the safety of its semi-autonomous driving technology, which it calls "FSD."

"Seeing some issues with 10.3, so rolling back to 10.2 temporarily," Chief Executive Elon Musk said in a Twitter post on Sunday.

"Please note, this is to be expected with beta software. It is impossible to test all hardware configs in all conditions with internal QA (quality assurance), hence public beta," he said.

Tesla did not immediately respond to requests for comment outside regular U.S. business hours.

The release of the new driving assist system to some owners of Tesla models, which the company said featured several improvements, had been announced for Friday, Oct 22.

On Saturday, Musk said the release would probably be delayed by a day.