Apologies for the late reply but maybe I can still help 🙂
I know it sounds simple, but it's often overlooked. Could you try restarting your device? If that doesn't help, try a quick clean reinstall of the app. Just follow these steps.
If you're still having trouble, could you let me know the exact version of Spotify and the exact version of the operating system you're running?
Keep me posted, I look forward to helping out 🙂
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Note: I'm not a Spotify employee.