The first thing to check is that all cables are in good order and that the connector soldering is not faulty.
Try recording with different sources (mics, guitars, line sources) to eliminate the possibility of the recording source having a fault and to see if the problem occurs with all three inputs to the unit.
Also, ensure that the input on the receiving device is not faulty by connecting a different source to it. Make sure all processing on the VoiceMaster Pro is switched out when you test.
After doing these tests you should have a good idea of if the VoiceMaster Pro is causing the signal to cut out or not.