Italo Frigoli was trying out the self-driving mode on his Tesla when he came upon a railroad crossing. The arms were descending and lights were flashing as a train barreled toward the intersection. For most human drivers, those are clear signals to stop, but for Frigoli’s Tesla, the potentially deadly situation didn’t seem to register.

Frigoli braked to avoid the potential crash, but his experience highlights a recurring complaint among some Tesla drivers about the company’s self-driving technology: The software sometimes mishandles railroad crossings, including by failing to stop for them.