Strange Gateway issue when using WAN-LLB

I have a FGR35D using two WAN links setup as WAN-LLB

When doing this it adds 2 static routes as gateways instead of the single Wan-load balance route, this is causing an issue with inbound port forwarding.

I have multiple units and the others do not do this all using v5.4.0,build5380 (GA).

Any ideas what would cause this?