White Box Autonomy

FSD delays a lane change and signal despite the driver holding the indicator

Date
April 2026 (day not known)
Developer / operator
Tesla
System
FSD
Location
Australia
Event type
Unexpected or inappropriate behaviour
Outcome
Failure / challenging
Automation status
Driving automation engaged — confirmed
Curator-reviewed

Summary

With FSD engaged, the vehicle delayed signalling and moving into the required lane until close to the manoeuvre point, even though the driver had already turned on and was holding the indicator.

Written by White Box Autonomy from the sources listed below.

What is observable from the evidence

  • FSD was engaged (curator's first-hand account).
  • The driver had manually set and was holding the turn indicator.
  • The vehicle delayed the lane change and its own signalling until late.

Automation status

Driving automation engaged — confirmed

Whether the driving-automation feature was engaged is a separate question from whether it caused the event.

System / software version

13.2.9

Causal attribution

Undetermined

The available evidence does not establish a cause. Involvement of a driving-automation system is not the same as its being a cause.

What remains unknown

  • The exact day within April 2026.
  • Whether any following vehicle was affected on this occasion.

Interpretation

No interpretation is offered for this event.

Sources & evidence

The sources below are the evidence. The summary and any interpretation on this page are written by White Box Autonomy and are not themselves evidence.

  1. YouTube video · White Box Autonomy

About this record

Review status: Curator-reviewed. What the review statuses mean.

Record last reviewed or updated: 1 September 2026.

To report an error or raise a concern about this record, contact zuduo.zheng@uq.edu.au.