Hi, Thanks for the update. I noticed the same thing with my car. If I wait for the dash to start then unlock my phone, and use an apple cable, I can "usually" get a full drive without a reset. But I'll still lose ability to use volume on the radio most times.
Since the update, Toyota is definitely having a communication issue with the iPhone.
I have Birdseye camera "Auto" activated on my screen and I notice that a lot of the dash resets are when I slow for a light. I have been trying to figure out which combination might work the best.
-In Rav4 forums, I notice that a dash reset by removing my Personal Account in the Toyota system could clear the issue.
some people also recommend disconnecting the 12v battery for a reset, but I'm going to try removing my account first to see if that helps.