User reports abrupt FSD 14.3.10 slowdown next to a semi truck

Unconfirmed: A Reddit user says a friend, using FSD on version 14.3.10, reportedly dropped from about 100 km/h (60 mph) to 37 km/h within moments, just as the car pulled alongside a cargo truck. According to the post, the system may have mistaken the truck's shadow for an obstacle. The vehicle behind managed to brake in time and avoided a collision. The author calls the episode a critical error and asks whether a combination of cameras and LiDAR would have prevented it. The post includes no recordings, system data, or confirmation from Tesla.

• Unverified report: FSD reportedly dropped from 100 km/h to 37 km/h beside a truck
• The trailing vehicle braked in time; no recording or official confirmation exists.

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