lxc containers packet loss ping unreliable

I'm running a 'current latest' proxmox (OVH Server stock install) 5.2-7 which has about 10 x LXC VMs on the physical host. Initially it was setup with ~5 VMs and then I added 6 more roughly a week ago. 5 of the 6 new VMs were deployed using a template/copy made from a slightly older proxmox5...