To address the issue where a song plays for only 18 seconds before repeating, here are the steps you can take to troubleshoot and resolve it:

1. Check Repeat Settings:
- Open the Player GR app on your device.
- Navigate to the playback controls and look for a repeat button or icon.
- Ensure it is set to repeat the entire playlist or a specific song, rather than only a brief segment.

2. Inspect Song Position:
- If the song is restarting consistently at 18 seconds, it might be that the repeat function is only set for a specific segment.
- Check if there is an option to set repeat to either “One” (which plays the same track continuously) or “All” (which rotates through the entire playlist).

3. Application Update:
- Ensure that the Player GR app is updated to the latest version, as bugs that cause playback issues may be resolved in updates.
- Update your iOS device to the latest version as well.

4. Restart the App:
- Close the Player GR app completely.
- Reopen it and select the song again to see if the issue persists.

5. Clear Cache/Data:
- If available in the app settings, clear the cache to remove any potential corrupted data that may be affecting playback.

6. Test Different Songs or Playlists:
- Play a different song to verify if the problem is specific to just one track.
- Switch playlists to check if the issue occurs only with a particular list.

7. Reinstall the App:
- If the problem continues, consider deleting the Player GR app and reinstalling it.
- After reinstallation, log in again and try playing the music.

8. Check Network Connections:
- If you’re streaming music, ensure a stable internet connection as buffering can affect playback.
- Reset your Wi-Fi router if necessary.

9. Device Compatibility:
- Confirm that your iPhone's iOS version (17.5.1) is compatible with the app's features, as inconsistency can arise from outdated software.

10. Contact Support:
- If none of the above steps fix the issue, reach out to Player GR’s technical support for assistance.

These steps should help restore expected playback functionality, minimizing disruptions and ensuring that songs play fully. If issues persist, there may be known bugs or ongoing maintenance from Player GR that could be contributing to the problem - learn more.