Hi there!
There are a few things you can do that might help with the situation.
1. Delete and reinstall the app.
2. Do a clear reinstall.
A clear reinstall is different from a delete-and-reinstall, and might help with some cache issues.
- Open Spotify. In the app's settings (you can access them by going to Home and then tapping the gear icon in the top right corner), tap Storage then Delete Cache.
- Head to your device's Settings, then tap General.
- Tap iPhone Storage.
- Select Spotify from the list of apps.
- Tap Offload the app and confirm. This will delete the app but its documents data will be kept.
- Then tap Delete App and confirm. This action should delete any leftover documents and data.
- Once the app is deleted, press and hold the Side/Top button and either volume button until the power off slider appears.
- Drag the slider to turn your device completely off.
- After your device turns off, wait a couple of minutes.
- Press and hold the Top (or Side) button again until the display turns on.
- Switch your device back on and install Spotify from the App Store.
3. You might have forgotten to log out on a different device and a friend or family member is unknowingly listening using your account.
This can be solved easily with the following two steps:
- Change your Spotify password, which you can do here
- Log your account out from all devices it's logged into, you can do this here
4. Change your password.
This could mean your account is compromised. I suggest you change your password, and things like that. You can find more info here: https://community.spotify.com/t5/Spotify-Answers/Has-someone-taken-over-my-account/ta-p/1215270
5. (Is Spotify SPT Audio Streaming SDK a 3rd-party software?)- If so, try removing it and then integrating it again.
Hope this helps!