Server 2016 loses gateway on ESXi 6.5

I was chasing this problem for months until I finally came across this link from VMware. Of particular interest was this note:

Note: VMware Tools 10.3.0 is deprecated due to a VMXNET3 driver related issue. For more information, see KB 57796. Install VMware Tools 10.3.2, or VMware Tools 10.2.5 or an earlier version of VMware Tools.