If the driver assignment is being performed from the WEB platform only, then the reason for missing or wrong driver can be other user actions that has access to this vehicle.
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To see driver changes, you can check that in the driver history. It can be opened from the Vehicle Data Panel screen if you press on the pencil icon next to the driver field:
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Once you see the time of when the changes were made, you will be able to understand what could be the cause and check those changes together with your colleagues.

If you are using Mapon Go for your business to do driver authorization in the vehicle, then the first reason that may cause 'no driver' situation is Vehicle auto removal option that has been turned on by the Mapon Go user. By enabling this option each time when the vehicle stops and the period that was set for auto removal has passed, driver gets unlinked from the vehicle automatically.

To prevent this situation, you will need to contact your driver who has enabled this feature and ask him to switch it off or increase the period for auto removal.

Sometimes drivers who are using Mapon Go want to check information about vehicles they are not driving at the moment. They go to their Mapon Go account and select the vehicle. If that vehicle is driving and the other driver has been assigned before, this action will remove the driver once the vehicle stops and the driver who has currently selected the vehicle in his Mapon Go account will be shown as the one driving it.

Currently there is no way how to prevent this in times drivers are using Mapon Go, because it would mean that client has to restrict access to vehicles or force drivers to unselect the vehicle once they have finished thier route or work.

Please instruct your drivers that they should only select vehicles in the Mapon Go app as part of their duties. All driving related statistics can be viewed without selecting a vehicle.

If the driver has forgotten to select the vehicle in the Mapon Go app before he started driving, he will not be assigned to that route. He will be displayed only after the first stop.

This means that if you are using authorization in the Mapon Go app, your employees and drivers should select the vehicle before the route has started.

If the tracking device is connected to the tachograph and Mapon gets either live data or it gets information from the remotely downloaded tachograph file, vehicle driver will be updated based on the data that Mapon gets from the tachograph.

If your tracking device, connection type and tachograph model allows to see live data of the tachograph, then driver updates on Mapon will happen according to the driver card changes in the tachograph.

If the driver has not inserted his driver card in the tachograph's first driver card slot or there are some other technical issues, Mapon will display previous driver or no driver at all.

If your tracking device, connection type or tachograph model does not allow you to see live data of the tachograph, but you are able to run remote tachograph file downloads, your driver will be always updated once the driver card tachograph file is downloaded.

In case you see unexpected driver change, it means that there could be a driver file download that caused driver changes. In this case, it means that there was incorrect driver before the remote tachograph file download was performed.
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In times you have only remote downloads available, we suggest to use alternative driver assignment process in order to avoid unclear driver changes while the route is being performed.

Mapon provides also a solution for driver authorization in the vehicles using physical RFID cards.

Using this solution minimizes any human mistakes in a driver assignment process, because there can be only technical issues or incorrect actions during authorization.