Hello,
We are seeing the same issue in our production environment with freshly installed hosts (Cisco C240-M2S's). I am going to try and upgrade from build 2809209 to 3073146.
I actually reinstalled 3 hosts with build 2809209 and now I am getting forced to go to the 3073146 build because the hosts appear to being having the network connectivity lost issue which is suppose to be resolved in build 3073146. We will see what happens.
I am hoping an upgrade helps with this, but very odd.
Thanks