Based on the timeframe that this bug was submitted (may 2017) i’m guessing this is only a problem on Hyper-v builds 1703 (as available in, win 10 ent x64-1703, hyper-v server 2016-build 1703, win server 2016 w/ hyper-v build 1703). Most likely the issues are being caused by the ARP protocol problem found only in Gen 2 vms in the PXE stack of hyper-v build 1703. See this Microsoft forum post for more details on how ARP was broken in this build. Still no resolution to my knowledge, but this post is most likely what will drive the fix from M$'s perspective.

https://social.technet.microsoft.com/Forums/en-US/436c67cb-1c7d-4c5f-8f62-3518a0cfaeb4/hyperv-build-1703-generation-2-pxe-has-faulty-arp-implementation?forum=winserverhyperv

Based on the timeframe that this bug was submitted (may 2017) i’m guessing this is only a problem on Hyper-v builds 1703 (as available in, win 10 ent x64-1703, hyper-v server 2016-build 1703, win server 2016 w/ hyper-v build 1703). Most likely the issues are being caused by the ARP protocol problem found only in Gen 2 vms in the PXE stack of hyper-v build 1703. See this Microsoft forum post for more details on how ARP was broken in this build. Still no resolution to my knowledge, but this post is most likely what will drive the fix from M$'s perspective.

https://social.technet.microsoft.com/Forums/en-US/436c67cb-1c7d-4c5f-8f62-3518a0cfaeb4/hyperv-build-1703-generation-2-pxe-has-faulty-arp-implementation?forum=winserverhyperv