Spotify no longer displays anything in my CarPlay. It's just a blank, black screen without audio controls or anything. The CarPlay navigation in the left sidebar is still available and I can switch to other apps which all seem to work, but Spotify is just blank. Must be an iOS 12 issue because it worked fine before that.
I posted about this in the Carplay subreddit as well and I was not the only one experiencing this so it doesn't appear to be a problem unique to my phone.
We've let the right folks know about the issues with the display when using Spotify with CarPlay.
If this occurs for you, we'd recommendgiving thesea try first:
Make sure Siri is turned on.
Check your iPhone has the latest version of iOS.
Restart your iPhone and your car.
If possible, connect your iPhone to a different USB port in your car.