Has this been confirmed ? Also its just interface or queues too ?The only thing I can tell you is that in the v6.4 change log it says:
"graphing - make sure that interface graphs gets preserved across reboots;"
You may try...
where does this IP 10.0.20.1 come from ? There are 2 interfaces, pointed to 10.0.11.0/24 and 10.0.12.0/24, nothing about 10.0.20.0add disabled=no distance=1 dst-address=0.0.0.0/0 gateway=10.0.20.1 routing-mark=to_ISP2 \