Network Card (NIC) losing connection when PC sleeps

Forgive me for the long post, but I wanted to give all the information I could up front. I am encountering a very frustrating problem for which I have yet to find an answer despite HOURS of research on forum after forum. The answers are always the same, and they have not helped me. When my new PCs go to sleep, they lose network connection. I truly hope someone can give me a real answer and not the typical, unhelpful, tech runaround (update your machine, update your drivers, blah, blah, blah). If the answer already exists in another question here or somewhere else, please someone just politely point me there, as I have been unsuccessful in finding it.

The problem manifests like this:

When either of my 2 PCs goes to sleep, its NIC seemingly does as well, and connection to my Synology home server is lost. This causes two problems:

1 - Whenever the PC is woken, all desktop icons are gone except for Recycle Bin. The desktop must be refreshed (right-click/Refresh) to restore icons (my Desktop folder resides on the server).

2 - Any document that was open when the PC went to sleep reverts to Read-Only, resulting in having to Save As another document. All my documents reside on the server.

Equipment:

I have 2 identical Windows 10 PCs that I recently built (one for me, the other for my children). AMD Ryzen 5 processor. B450 AORUS PRO WIFI motherboard. Gigabyte BIOS, version F5, 01/25/2019.

My NIC is an Intel(R) I211 Gigabit Network Connection. 

The PCs are hardwired (ethernet cable, not WIFI) to a home network where all user account folders (Desktop, Music, My Documents, etc) are hosted on an 8 TB Synology home server.

Let's get the obvious out of the way so folks don’t have to waste their own time telling me to do things I have already done:

1 - This is most likely NOT a server issue. Both previous computers (which were underpowered Windows 10 machines) did not exhibit this issue. Only the new machines do. I have changed no settings on my server at all.

2 - Both machines are completely updated with all Windows 10 available updates installed.

3 - My NIC has the newest driver package installed from Intel.

4 - In Device Manager/NIC Properties/Power Management, "Allow the computer to turn off this device" is UNchecked.

5 - In Device Manager/NIC Properties/Advanced, (1) Energy Efficient Internet is OFF (2) Wait for Link is Auto Detect (3) Wake on Link is Disabled (4) Wake on Magic Packet is Enabled (5) Wake on Pattern Match is Enabled

6 - There is not a whole lot in my BIOS that I found helpful. I don’t know if these are relevant, but I included the info anyway: (1) Under BIOS, Network Stack is Disabled (2) Under Power, Wake on LAN is Enabled

7 – Because the BIOS is so new, the one thing I haven’t checked for is a BIOS update. I highly doubt this would help even if there is one, but I hopefully will have time to check this sometime today anyway.

Please excuse any perceived bluntness in my tone. At this point, I am just a bit frustrated and want this problem to go away. Hopefully one of you tech-savvy wizards out there can point me in the right direction. Thank you in advance. It’s got to be something simple I am missing. I am fairly comfortable in Regedit or whatever needs to be done. I can post screenshots/Snagits if needed. My best regards to you.