After swapping out routers, changing cables, trying 3 different media players, fiddling with options, vendor inquiries, ARP tests, packet tests, Ping Tests, Tracert tests, firmware updates, enabling everything hard wired and enabling/disabling Power settings, I can confirm the issue was due to the fault of the Western Digital NAS drive. A “Restore to Default - System Only” has resolved a 3 week long issue with audio files stopping / pausing. In addition, at the same moment, the user interface with the EXII Ultra would freeze up. Once the audio starting playing the UI would be fine again. There were no windows updates pending on either PC, anti virus was told to ignore the shared folders and the absolute latest firmware was installed as confirmed by WD support. I probably have close to 24 man hours or more into this tech issue and its finally gone. (Be sure to backup your configuration prior to the reset).
The audio software used was: Foobar 2000, Windows Media Player and VLC on two different computers a Win 7 and Win 10, both hard wired.
I sure hope this helps anyone who has this issue with a Western Digital NAS Drive and noticing skipping or pausing with their audio files. I have reported this anomaly to WD support.