Pfsense on proxmox. Packet loss

[N01dea]

PVE 7.1-10
pfsense 2.5.2.

Problem with a packet loss. From time to time the packet loss to the gateways increases up to 30%. At this moment packet loss occurs for any traffic going through pfsense. There is also a packet loss when pinging pfsense from hypervisor and switch. And no packet loss at all to other VM on this hypervisor.

There is an increase in io delay during packet loss, but it is very small. There are more than enough resources on the pfsense virtual machine, as well as on the hypervisor.

Hardware Checksum Offloading is disabled.

any thoughts? Thanks in advance.