Anytime I have an issue I open a private ticket in TeslaFi and James responds pretty quickly. I don't know why people seem to address things in comments there when we pay for support because we pay for the product.
I have this issue with my Model 3 now and opened a ticket and then decided it's the new Bluetooth text message connection in 2019.40.50.1; I even got a response from him in a few hours on Saturday morning, which I wasn't expecting.
In ANY case, anyone with the new firmware (40.50.1) seeing this? When you enabled the BT sync for messages on the car side, and your phone is nearby (meaning 30 feet, normal BT), the car doesn't seem to sleep. I got dozens of 'car is sleeping' emails last night, with no 'car is trying to sleep' emails. It seems to keep it awake and interfere with comms, also. API errors, other things. Makes no sense, full wifi signal, normal garage location, only change is the text message BT sync turned on a couple of days ago when 40.50.1 loaded.
Turned it off, rebooted, immediately cleared the errors, car immediately slept after the timeout.
All I can say I hope this is addressed in 2019.40.50.5, which seems to be in testing now (from what TeslaFi shows). And, can't do anything with the phones, as 30 foot BT range covers much of the house. Fobs can go in a faraday bag and moved somewhere. Hard to do that with the phones...
(Rebooted this AM to see if that fixed anything before turning off the sync, nope. Turned off just the message sync in the car (Bluetooth menu, top right of display) and that cleared it. Note that a reboot turns it back on, also weird. Turn it off, and you are set.)