While everything is silent on the Tesla front, the most quoted hypotheses point to problems related to the use of flashing lights by the police. Cameras and sensors used by Autopilot, at least in the current version, seem to “go crazy” in the presence of these lights and therefore upset the normal operation of the car. As attentive readers know, this is not an isolated case since the NHTSA government agency (which deals with road safety in the USA) has opened an investigation into this specific problem.
From 2018 to today , in the United States alone there have been several incidents between a Tesla with Autopilot activated and emergency vehicles such as firefighters or police. Overall, they have caused around twenty injuries and one casualty, so this is no small matter. And if in other cases the driver could be responsible, because he is not careful, here it is the vehicle that suddenly "targets" another vehicle. And as you can see from the images, the damage suffered by the three cars involved in the accident in Florida is significant.
In common with other malfunctions of the same type, this latest collision had the poor ambient lighting and warning lights used by the police car. But without specific solutions or updates, the question remains open. Waiting for clarity, it is good that the US law enforcement turns off the flashing lights when they see a Tesla coming. Especially late at night.