OK, I am not sure but I do not think that this issue could be an hardware problem...
What are you using exactly on your FCB?
As I said before, I can not reproduce this issue neither see other reports like your´s from other users at this time...
We will try to understand and fix your setup, don´t give up on it ;)
Cheers,
KV
PS: let´s try something out... please reset your CALL SIGN to other then default and save. Check and report!