Possible problem with RADIUS and shared networks

RADIUS uses the (re)selected subnet to fetch a cached host entry: this is not correct with shared networks where it should try all subnets of the shared networks without a guard incompatible with the query. And when RADIUS creates a new host entry for a reserved address it uses the (re)selected subnet instead of a subnet where the address belongs.

These two problems can make RADIUS to fail to find a cached entry: not a bug as the server will return the informations but not without performance impact...