R7000 Does not Detect Ethernet Cable from Sleeping PC

Are you sure about that one? What site is that at?

I found drivers for the at the REALTEK SITE, I'd use those.

What exactly is your network adapter and what chipset does it use? Is it the "Realtek PCIe GBE Family Controller"? If it is, check my screenshot. I'm on Win10 Home, V1809, and my NIC is actually older and works (it is NOT in use now) fine as of about 5 weeks ago, and had worked fine wih the R7000 I had connected about 10 months ago.

If you open up SYSTEM INFORMATION (can search for it by entering system on the search line for Siri) and then select NETWORK, then ADAPTER you'll see a list of them depending on how many you have. My NIC has this info:

Name [00000001] Realtek PCIe GbE Family Controller
Adapter Type Not Available
Product Type Realtek PCIe GbE Family Controller
Installed Yes
PNP Device ID PCI\VEN_10EC&DEV_8168&SUBSYS_05B71028&REV_0C\010000000000000000
Last Reset 1/27/2019 5:43 AM
Index 1
Service Name rt640x64
IP Address Not Available
IP Subnet Not Available
Default IP Gateway Not Available
DHCP Enabled Yes
DHCP Server Not Available
DHCP Lease Expires Not Available
DHCP Lease Obtained Not Available
MAC Address Not Available
Driver c:\windows\system32\drivers\rt640x64.sys (10.28.615.2018, 1.09 MB (1,139,424 bytes), 7/29/2018 10:32 AM)

Suspect yours would be the same as this.

When I look at the date of the driver's timestamp on the last line, it is 7/29/2018. It could very well be the same one on the RealTek site as it would be included in that package because the RealTek site has the SAME date? Of course the real Driver is that last line. Possible MS installed it along with V1809 even? Just need the .SYS file possibly?

Check what you have before trying to update, but if you do, get it off the RealTek site, much safer. Quite possible if you do try to install it it could even tell you you are up-to-date even?

Did you check all the properties for Power Management as well as the Power Plan?