I think its an issue with how the shield resets itself. Whenever I reset mine i end up holding the button for about 1-2sec to be sure it resets. if it played once then it means your shield isn’t broken (that’s the whole reason i started this, thought mine was). I personally have been using OGG files. I don’t know if adding the patch for the vs1053b will help but that’s not in there yet. Try seeing if a long reset will help, ill look through the program for any possible issues.