I think you will find, or I have read, that Tesla's charger only really wants to charge Tesla's or the communication with the car is not exactly correct.
If I find the information I will paste it here

I have also just found the same issue after buying a first addition. Even though the user manual states its possible, the issue is you can't enable it in the Vehicle settings. Oddly, when I started to try and set it, it initial came up with the setting to enable reverse dipping, but promptly disappe...