Crashes on RDP reconnect

[dab]

I have Ubuntu 18.04 host running VirtualBox 6.1.14 with Server 2016 guest, it crashes if I try to RDP when there is a lot of network traffic. I can connect, disconnect and reconnect with no problem if there is no network traffic but if I start one of the programs that uses a lot of network bandwidth, approx 30Mbit according to Taskmanager. If I disconnect then try to reconnect the VB will crash. I've attached the config and logs.

[fth0]

In the VM configuration, change System > Acceleration > Paravirtualization Interface to Hyper-V and see if it makes a difference.

When you try and reproduce the problem the next time, write down the absolute times for the actions you take, so that we can match them to the VBox.log file. If the crash leads to a VirtualBox message box, close this message box before copying the VBox.log file, so that it contains the statistics at the end. Anyway, what do you mean when you say crash?

[dab]

I'm running a headless version but I did change that (VBoxManage modifyvm "Win2016 1" --paravirtprovider hyperv) and now can't connect to the server.

When I said crash, the VM shutdown. It was shutdown from VB side not windows.

[dab]

So it looks like you can't use hyperv for Linux host, I tried KVM but still same issue.