ping ipv6 doesnt work from VM to LXC container on same Proxmox

[bugacha]

I'm on 9.0.11 and have VM and LXC container created on same VM

Both have static IPv6 addresses, Firewall is off, also this is off

echo 0 > /sys/class/net/vmbr1/bridge/multicast_snooping
echo 0 > /sys/class/net/vmbr1/bridge/multicast_router


I can ping ipv6 from LXC container to VM, but I can't ping back

running tcpdump on LXC container and on Proxmox bridge show icmp6 traffic going in and going out, meaning that LXC container sees ping and replies.

running tcpdump on VM - only shows outgoing icmp6, not incoming.

Any ideas what can it be ?