@Stelcom66 Sounds like your mobile phone is updated to a newer Android OS. This appears to be the letter of the alphabet as your scroll and is a feature of an older Android OS. From the screenshot you posted, the letter basically gets stuck as you continue listening, and scrolling down your station list.
If you are using an Android device that is not able to upgrade to Android 7.0 or higher, you should be able to download a previous version of the Pandora app from the Google Play store.
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