Intermittent connectivity loss - OPNsense VM unreachable

[elvinmammadov]

Hello,

Sometimes OPNsense (running as a VM on Proxmox VE) becomes unreachable (no Web UI / no ping), which causes all VMs behind it to lose internet connectivity.

The issue is only resolved by opening the OPNsense console and either reloading all services or rebooting the VM. After that, everything works normally again.

Notes

• Issue appeared after upgrading to 25.7
• Did not happen on older versions

Question:
Has anyone encountered this issue? Is there a known solution or workaround?