I did have a OTA update a couple of weeks ago, but I'm fairly confident the issue started with my switch to the S21 and not a Sync update. It really seems more on the phone software side of things to me, rather than the truck itself. But that is just a guess.
I installed the August update on...
For the first month after owning my truck, I used Android Auto wirelessly with a Galaxy S10+ and never once had the "Your wireless connection is unable message"
Switched to S21 Ultra a couple weeks ago and started getting the error message. It only shows up when I am on a screen other than...