I have the same problem. One of 15 tracks Plays Sound at the beginning, but suddenly is muted. The track itself can be played correctly with VLS for example. The problem occurs already after starting the project without any effects.
I had this Problem not only once, so I tried something and found a work around:
Copy the file ***.wav to another, lets say, xxx2.wav. Import this file into a new track. This track can be played from start to end. I hope, this will help you all.