I cannot reach the VMs in the cluster subnet

[Snapp]

Hi, I have installed proxmox on an OVH cloud, following a restart of the cluster I can no longer reach the VMs of one of my subnets.
In practice I have a vm that has the wan in the subnet 192.168.3.x / 24 and from the cluster it is not reachable.

below I am attaching the configurations set on the cluster:

cat /etc/network/interfaces

# network interface settings; autogenerated
# Please do NOT modify this file directly, unless you know what
# you're doing.
#
# If you want to manage parts of the network configuration manually,
# please utilize the 'source' or 'source-directory' directives to do
# so.
# PVE will preserve these directives, but will NOT read its network
# configuration from sourced files, so do not attempt to move any of
# the PVE managed interfaces into external files!

auto lo
iface lo inet loopback

auto eno1
iface eno1 inet manual
        address <Public IP>
        gateway <Public gateway IP>

iface eno2 inet manual

iface enp0s20f0u8u3c2 inet manual

auto vmbr0
iface vmbr0 inet manual
        bridge-ports none
        bridge-stp off
        bridge-fd 0

auto vmbr1
iface vmbr1 inet static
        address 192.168.2.1/24
        bridge-ports none
        bridge-stp off
        bridge-fd 0

        post-up echo 1 > /proc/sys/net/ipv4/ip_forward
        post-up   iptables -t nat -A POSTROUTING -s '192.168.2.0/24' -o eno1 -j MASQUERADE
        post-down iptables -t nat -D POSTROUTING -s '192.168.2.0/24' -o eno1 -j MASQUERADE

auto vmbr2
iface vmbr2 inet static
        address 192.168.3.1/24
        bridge-ports none
        bridge-stp off
        bridge-fd 0

        post-up echo 1 > /proc/sys/net/ipv4/ip_forward
        post-up   iptables -t nat -A POSTROUTING -s '192.168.3.0/24' -o eno1 -j MASQUERADE
        post-down iptables -t nat -D POSTROUTING -s '192.168.3.0/24' -o eno1 -j MASQUERADE

ip -c link

...
40: vmbr2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000

 arp -a
? (x.x.x.x) at XX:XX:XX:XX:XX:XX [ether] on eno1
? (x.x.x.x) at XX:XX:XX:XX:XX:XX  [ether] on eno1
? (192.168.2.15) at 32:c3:6f:c4:1b:ed [ether] on vmbr1
? (192.168.2.105) at 72:9c:36:cf:2b:8c [ether] on vmbr1
? (x.x.x.x) at XX:XX:XX:XX:XX:XX  [ether] on eno1
? (192.168.2.95) at 3a:6a:e7:4f:3e:e0 [ether] on vmbr1
? (192.168.2.106) at 12:f2:74:8d:f4:47 [ether] on vmbr1
? (192.168.2.77) at 1e:d2:c1:f5:c9:eb [ether] on vmbr1

ip r s

192.168.2.0/24 dev vmbr1 proto kernel scope link src 192.168.2.1    
192.168.3.0/24 dev vmbr2 proto kernel scope link src 192.168.3.1


ping 192.168.3.105
PING 192.168.3.105 (192.168.3.105) 56(84) bytes of data.
From 192.168.3.1 icmp_seq=1 Destination Host Unreachable
From 192.168.3.1 icmp_seq=2 Destination Host Unreachable
From 192.168.3.1 icmp_seq=3 Destination Host Unreachable
From 192.168.3.1 icmp_seq=4 Destination Host Unreachable
From 192.168.3.1 icmp_seq=5 Destination Host Unreachable
From 192.168.3.1 icmp_seq=6 Destination Host Unreachable

Could someone tell me what the problem is?
thank you in advance