It seems to only be a wired Ethernet issue.  I added Wifi.  Wifi
consistently reconnects as expected; Ethernet consistently fails.

Before suspend, `nmcli d`:
DEVICE  TYPE         STATE          CONNECTION 
enp9s0  ethernet  connected  Ethernet1  
wlp8s0  wifi            connected  NETBEAR-5G 
lo           loopback  unmanaged  --         

After resume, `nmcli d`:
DEVICE  TYPE         STATE                                                      
     CONNECTION 
wlp8s0  wifi            connected                                               
    NETBEAR-5G 
enp9s0  ethernet  connecting (getting IP configuration)  Ethernet1  
lo            loopback  unmanaged

Is this a hardware incompatibility issue?

Ethernet hardware (Source: `lshw`):
          *-network
                description: Ethernet interface
                product: RTL8111/8168/8411 PCI Express Gigabit Ethernet 
Controller
                vendor: Realtek Semiconductor Co., Ltd.
                physical id: 0
                bus info: pci@0000:09:00.0
                logical name: enp9s0
                version: 02
                serial: 00:23:5a:2c:22:8d
                size: 1Gbit/s
                capacity: 1Gbit/s
                width: 64 bits
                clock: 33MHz
                capabilities: pm msi pciexpress msix vpd bus_master cap_list 
rom ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd 
autonegotiation
                configuration: autonegotiation=on broadcast=yes driver=r8169 
driverversion=2.3LK-NAPI duplex=full latency=0 link=yes multicast=yes port=MII 
speed=1Gbit/s
                resources: irq:27 ioport:2000(size=256) 
memory:d1010000-d1010fff memory:d1000000-d100ffff memory:d2500000-d250ffff

Please find attachment to this comment for more information if required.

** Attachment added: "tar.gz of a directory containing various logs"
   
https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1498692/+attachment/4472336/+files/1498692.tar.gz

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https://bugs.launchpad.net/bugs/1498692

Title:
  Network Manager wired Ethernet stuck in "getting IP config" after
  resume from suspend

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