Sir,
Are you really asking us how to debug your own firmware?
In the firmware made by 4DSP, the one shipped with our hardware we don't have this issue so it must be a problem in your own firmware and there is nothing I can do for you.
Now if you tell me the problem is in our reference design, then I will get it fixed for you.
I also see that you purchased the board from Avnet, Avnet is supposed to provide you with technical support, not 4DSP.
Best Regards,
Arnaud