Tesla fleet integration does not name entities for second Tesla

I have installed the Tesla Fleet integration and it seems to work fine. Entities etc are installed for both of my Teslas. For some reason the second car’s name is not used.
For the first car entities contain the ca’s name, eg. sensor.mycarsname_battery_level. However the entities for the second car do not include the car’s name, so they become: sensor.battery_level. That’s bad because renaming the device in order to bulk rename the entities fails.

Any idea?