I no longer have this issue after upgrading from an iPhone 13 Pro to an iPhone 14 Pro with fresh installation of iOS 16.1.2. I did not transfer over any data so maybe that helped too. I can now ask Siri to play a song and she will automatically play it on Pandora, treating it as the default music player. I didn't have to mess with any settings to get it to work. It just worked.
... View more