Hi Tony
Something else to try........

I see you also have a WD NAS on your Network

This is likely to accessible via

a) an IP Address in a Browser windows............which will then return an "Information & Settings" Page

b) a WD App from their Website that would also allow you access the WD NAS

As you can see from the above, a) and b) mimic what Meridian are doing with their Control:Web and ControlMac apps

Can you try both methods of accessing your NAS........and then Sleep / Wake your PC and see if both methods of access still work

Just trying to get to the root of the problem............

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