Hi,
I did come across a DC that experienced the same issue. We did ultimately escalated to MS as we simply couldnt resolve no matter what we threw at it to fix the problem. In our instance it was a machine that had had its virtual nic removed and re-added and "stale" entries for the old nic where appearing as hidden devices in device manager - removing them resolved the issue.
Curious if that doesnt work have you tried using a e1000 vmnic instead of vmxnet3(assuming thats' what your using) just to see if the issue re-appears?
regards