The actual problem was that when I was parked in my garage at home my Tesla would constantly "re-initialize" both the WiFi connection and the Bluetooth connection. Every 10 to 15 seconds the WiFi would "toggle" between the LTE cellular indicator and the WiFi indicator. It seemed as though it was trying to connect to my Wifi but could not seem to do so and defaulted back to the LTE cellular indicator. That's abnormal as it should change from the LTE over to WiFi and stay there as long as I was parked in my garage (provided that I have a good WiFi signal in the garage - which I do) . I could not attach my phone to Bluetooth and I could not hold a signal long enough to download software updates from Tesla. Very frustrating. After seeing that others have had the same problem made it easy for me to do so as well.
Turns out that my WINK 2 Hub (which was on the same mesh network) was "fighting my WiFi and Bluetooth" for a connection. The solution turned out to be to put the Tesla WiFi on a completely separate network so that it isn't competing with WINK. The trick is to make sure that the separate network is truly separate. Some routers seem to let you set up a "guest network" but it really isn't separate and the overlap with WINK is still there. It seems that my EERO routers do, indeed, have a separate network and it solved the problem.
I would agree that WINK isn't great, but it sure beats Samsungs Smart Things, in my opinion.
By the way, if you are not having the conflict with WINK, don't change anything... If it ain't broke, don't fix it as they say;.