I am having a similar issues in both of my vehicles with Apple CarPlay and Pandora. I have an iPhone 13 Pro with IOS 15, v. 2108.1.1 of Pandora, and in both my 2016 Mustang and 2021 Enclave the CarPlay services immediately disconnect when I start the Pandora app. If I do not use the app, everything else works fine (i.e., Waze, messages, etc.).
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