Thank you for your provided information.
In this case, we want to recommend you to update the firmware to the newest one and check, if it helped. If it's not, then, will need to do log files to check device behavior. Information about how it will need to do will inform our Sales manager and Techincal Support engineers.
Moreover, we would like to inform you that we do not share firmware files/updater and other files in the community forum. To receive firmware files, updater, and documentation on devices, please contact your Sales manager.
If you don't have any contacts with our Sale managers, please contact with them on our official website https://teltonika-iot-group.com/
and click on the "Contact Us" button. When you will click, please fill the form and submit it.
Note: as a topic, please choose "Vehicle telematics".
Best regards,
Teltonika Support