@MCFH: Static routes are references to networks that can be reached in a way other than via the default gateway. In Linux, for example, you can do this with the relatively self-explanatory command
ip -6 route add 2001:db8:abcd::/48 via 2001:db8:1234:5678::99
Of course, on a consumer router, something like this is configured in the GUI and not via a CLI command. There is already a corresponding option on the IB for IPv4 (Expert Mode->Network->Static Routes), but not yet for IPv6. Static IPv6 routes on a router with a potentially dynamic 6th prefix don’t make much sense either. Maybe IPv6@swisscom or someone from the IB team can give us some insight into future planning?
Have you tried turning it off and on again?