Excuse me, what playback software is installed on your tablet? This situation should have nothing to do with TF card. It should be that your player is not set up properly or your player's loop playback function is not perfect. Please check your player's settings. If your own music player has no loop playback setting function, you can try to download Everyday Music V1.4 or Chihiro Music Box 1..2, both of which can support music loop playback very well.
Thank you! I hope your problem will be solved as soon as possible!
wish you a happy life!