Why the reconfiguration? Where there errors or was it caused by changes in the update?
As @stevemann already mentioned in the other topic:
This would be my guess as well. As you can see, HA is still running, whereas the connection isn’t possible. That points into the direction, that the device, responsible for all network thingies, could be the problem. In your case the router or whatever handles your network.
I’d start searching in this direction. 
I wouldn’t say, HA isn’t the culprit, maybe something is wrong, but I wouldn’t focus my search on HA. It’s evenly possible, that any other device is messing with your network. Eg. some device is integrated by HA and is flooding the network with wrong data for some reason. You wouldn’t find anything on your HA server, but it would explain, why disabling HA would solve the problem.
Let us know how things go!