What is your battery temperature?
This happened to me once when the battery got too hot (very hot day, very hard driving.)
It recovered when it cooled off.
I was not charging, in fact I simply powered the car up to leave.
Power cycle fixed it and it ran fine.
Do I have a battery issue, or was it a random Taycan glitch? We will never know!
AFAIK it still doesn't save your settings.
The built in nav is "okay." You'll want to use it over Carplay anyway, as it's the only way to precondition your battery for charging on trips.
I end up putting my phone in the door pocket.