Just some details for archive, in case someone has the same problem in the future.
The problem seems to appear each time I forgot to disconnect my phone from the car before leaving it.
When so, I suspect some car energy saving that doesn’t cleanly disconnect the phone from the car leading to missing usb recognition at the next connexion.
1/ on your phone, go on App Lounge to Android Auto, and update if needed (update is not automatically done, I don’t know why).
2/ restart your phone
3/ restore factory settings on your car interface
4/ connect your phone ; android auto config should start
When stopping your motor, always disconnect your phone before leaving. For me, knowing this rule, it works quite properly…
Let me know of your test!
Bonne soirée (j’écris en anglais pour que le poste soit référencé) !