Sanako Study 1200 loosing Audio during exams

[richardg7vyi]

Has anyone encountered this at all. We use Sanako Study 1200 for listening exams. Windows 7 with Sanako Version 8 software. Randomly during recent exams students have lost sound from player in the Sanako Headsets. I found by chance yesterday that simply clicking on workstation in teacher console then closing the little pop up control window again restored sound instantly. 7 workstations out of 24 went down yesterday at random time intervals during exam ranging from minutes in to an hour or more in. Sanako say it's not a known issue to them and I'm finding I'm unable to reproduce it to try and prove anything. Trying to not do anything drastic unnecessarily as there's only a few days between exams at moment.