When you restart the bgp routing protocol via "restart bgp" it throws an error that the route-maps do not exist.
I was able to reproduce this in any configuration where a route-map is used in a BGP neighbour configuration.
The BGP session then will be established WITHOUT any filters and produces route leaks.
tom@vyos.as200950.net:~$ restart bgp WARNING: This is a potentially unsafe function! You may lose the connection to the router or active configuration after running this command. Use it at your own risk! Continue? [y/N] y The route-map 'INT-RS-IN' does not exist. The route-map 'INT-RS-OUT' does not exist.