1. Only these 12 songs are incomparable. Others have the problem of excluding audio sources:

1.1. Format problems:

These 12 mp3s are What format, such as mp3, wma, flac, ape, etc. Some formats may not be compatible with your player. It is recommended to switch to music in mp3 format.

1.2, encoding rate:

Is the encoding rate of these 12 pieces of music very high? It's the kind of lossless music. In this case, if Bluetooth cannot accept the data stream, it will easily die.

1.3, Completeness:

It is recommended that you listen to these 12 pieces of music. Some music will be interrupted in the middle (the data may be wrong). This will also result in the inability to play music.

2. There is a problem with the player. Change the player to see if the problem still exists.

3. For Bluetooth headset problems, try changing the Bluetooth headset (the probability is relatively small, but write it in anyway.)