For what was probably several months My 2023 MY did not reliably lock when I walked away. I am using an Iphone 16 pro that was up to date both IOS and Tesla App. I also had similar issues with an Iphone 7. The car had run a number of software versions, the most recent that failed was 2025.8.4. More than 50% of the time I would walk away and discover the car had not locked. A small percentage of these failures included a message that the car had lost contact with the phone (after I walked away). I do not use the setting to leave the car unlocked at home and the problem occurred both at home and away. Since upgrading to 2025.8.4 a couple weeks ago, and 2025.08.06 5 days ago., I have not experienced any walk away lock errors. I can't state the specific software version that introduced the problem but would not be surprised if it was the version that introduced the ability for the app to communicate directly with the car with blue tooth when close enough.
