Hi,
Ihave a H8000fw sw v.5.5, connected with my Symphony mkii through AES/EBU 1&2 in the configuration AES4 A-B.
The clock is reported to be slipping (the EXT lid is blinking and also on the clock menu AES 1/2 clock is slipping and in the other page of the menu reported as AES11&12 are unlocked.
I have already done a clear set up.
I use a MacPro late 2013 with OS 10.14.6