Losing connection to TrueNAS when VM is turned on

I am very new to TrueNAS and tried creating fist VM, i was able to create it but had CPU warning that i can’t use more then 1 CPU.
So i went ahead and created VM with just single CPU. everything went fine but when i turn the VM on I lose connection to the TrueNAS box for about a good 1 min, then it comes back on.

i am using TrueNAS-13.0-U6.1

any advise on fixing this issue?