Proxmox unresponsive after "powertoping" Ethernet Controller

[krulaks]

So I am trying to allow my proxmox to enter cstates by using powertop.
I can set every Tunable to "Good" except for "Runtime PM for Intel Corporation Ethernet Controller I226-V".
When I set this Ethernet Controller to "Good" my whole Proxmox becomes somewhat unresponsive & unreachable.

Ping or ssh results in very long timeout and webgui somewhat works, but just the Frontend - statuses are unknown and when executing simple commands in shell nothing happens. Only hard reboot helps - meaning powering off from power source/holding the power button.

I do have two VMs - Unraid and Ubuntu with docker.
What weird is that both VMs are accessible and 100% operational. They can access internet and I can ssh to them.

I am using WiFi only for my proxmox as atm I do not have possibility to utilize LAN cable.
I was thinking that maybe powertop just disables WiFi module, but no - since VMs are working fine.

Asrock Z790M-ITX WiFi
i5 12600k

/etc/newtork/interfaces just in case:

auto lo
iface lo inet loopback

iface enp0s31f6 inet manual

auto vmbr0
iface vmbr0 inet static
        address 192.168.4.1/24
        bridge-ports none
        bridge-stp off
        bridge-fd 0

iface enp2s0 inet manual

auto wlp0s20f3
iface wlp0s20f3 inet manual
        address 192.168.2.10/24
        gateway 192.168.2.1

auto vnet1
iface vnet1 inet static
        address 192.168.3.1/24
        bridge-ports none
        bridge-stp off
        bridge-fd 0
        hwaddress f6:c7:43:09:0b:45
        post-up echo 1 > /proc/sys/net/ipv4/ip_forward
        post-up iptables -A FORWARD -i wlp0s20f3 -j ACCEPT
        post-up iptables -A FORWARD -0 wlp0s20f3 -j ACCEPT
        post-up iptables -A FORWARD -i vnet1 -j ACCEPT
        post-up iptables -A FORWARD -0 vnet1 -j ACCEPT