Lexus GS 2013+ :: Bluetooth - Audio Dropping Out From Phone Calls And Streaming

I've had so many issues with audio dropping out from phone calls and streaming that I've almost thrown my phone at the NAV screen in frustration.

Background: In the 7 months since I bought my car new (2013 GS F-Sport) I have had 2 Droid Maxx's, 1 Droid Turbo and am currently on a Samsung Note 4. I've gone through hard resets of my phones, deleting the phone from the car, changing apps in use, trying to use the car with after a reset and removing most stock apps. I've also mostly disabled the text message and email options as it doesn't work consistently, and I don't need people in my car to see when I get texts.

Each of the phones has has issues staying connected to the car. About 30 seconds after dropping the car will register the loss of the bluetooth connection. The worst part is I can go hours without a problem, then I'll get 1, or I'll get a problem every 4 minutes until it suddenly stops.

I've called Lexus a three times are had a few different answers. At first they told me to always drive with the wifi disabled and that should fix my problem. Then they said to have the dealership check my firmware. The dealership said my firmware dated 2012 is the most up to date (sounds like a load of BS to me). Most recently, they said there is an error in Android 4.2's kernel that screws up bluetooth. Now all of my phones have been on Android 4.4.x since I bought the car, and Lexus said they aren't aware of any issues with 4.3 or 4.4.

My coworker follows the same phone upgrade path as me (Maxx, Turbo and Note4), and he has never had a dropout issue on his 2014 X5, so the kernel issue doesn't seem to hold water.

Lexus made it sound like this is a WIDE spread problem, but not one they need to fix. Also what firmware version are you running in your 2013 GS?