Hotspot not available until phone unlocked

My VW car can use the hotspot feature on my Galaxy S7 phone as a network connection to download traffic data.

I have installed tasker so that it auto starts the hotspot on my phone as soon as it connects to the car bluetooth system.

The problem is that the car cannot connect to the hotspot until the phone is unlocked.

Is there a way around this?

Use the smart unlock feature(trusted devices) so when you are connected to the cars Bluetooth it stays unlocked.