Windows 2008R2 virtual machine with virtio drivers losing network connection on reboot of vm. Rebooting vm does not fix, sometimes force stop of the vm or a reboot of the whole unraid server is required to get the connection back.
I am having this same issue, I have did memory test, replaced memory and powersupply and have not resolved the issue. I am now downgrading to 4.7 since everything was stable until the 5 rc 3 upgrade.