Hi there, @Gloobert. 👋
I have seen some reports where this issue occurs with iOS 13, 14, and iOS 15 - outside of the Pandora Community. There's a bug where Apple messages indicates that a message has been read even if you have this feature disabled. A reboot of your device could resolve this temporarily.
I would recommend contacting Apple to report this and asking for any suggestions regarding this feature. Based on your message, it sounds this only occurs when you're using Bluetooth.
I was able to locate a similar thread on the Apple Support Community here.
Are you on the newest iOS version?
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