Earlier this week, Waymo filed a software recall for 3,067 of its 5th-generation vehicles, after the National Highways Traffic Safety Administration (NHTSA) opened an investigation into the vehicles’ behavior around school busses. Though Waymo claims it had patched all affected vehicles by November 17, CBS reports that the Austin Independent School District (AISD) logged at least one violation after that date. In response to the early December violation, AISD officials reached out to Waymo, asking it to limit operations around school drop-off and pick-up times. “They did not agree with our risk assessment and respectfully declined to stop operating,” Austin ISD Police Chief Wayne Sneed told CNN. More on self-driving cars: Grok, Now Built Into Teslas for Navigation, Says It Would Run Over a Billion Children to Avoid Hitting Elon Musk