use Beryllium-SR2, for one route,bgp maybe advertising not best one to peer

controller has two rr-client peers,peer A and peer B.
A and B advertising route 11.12.13.0/24 to controller.
ex:11.12.13.0/24 from A is better.controller reflect 11.12.13.0/24 to B,nexthop is A.
when B'route advertising early A'route.controller also advertising 11.12.13.0/24 to A,nexthop B.

example of bgp rib data as:
<module xmlns="urn:opendaylight:params:xml:ns:yang:controller:config"><type xmlns:x="urn:opendaylight:params:xml:ns:yang:controller:bgp:rib:impl">x:rib-impl</type><name>example-bgp-rib</name><session-reconnect-strategy xmlns="urn:opendaylight:params:xml:ns:yang:controller:bgp:rib:impl"><type xmlns:x="urn:opendaylight:params:xml:ns:yang:controller:protocol:framework">x:reconnect-strategy-factory</type><name>example-reconnect-strategy-factory</name></session-reconnect-strategy><rib-id xmlns="urn:opendaylight:params:xml:ns:yang:controller:bgp:rib:impl">example-bgp-rib</rib-id><extensions xmlns="urn:opendaylight:params:xml:ns:yang:controller:bgp:rib:impl"><type xmlns:x="urn:opendaylight:params:xml:ns:yang:controller:bgp:rib:spi">x:extensions</type><name>global-rib-extensions</name></extensions><codec-tree-factory xmlns="urn:opendaylight:params:xml:ns:yang:controller:bgp:rib:impl"><type xmlns:x="urn:opendaylight:params:xml:ns:yang:controller:md:sal:binding">x:binding-codec-tree-factory</type><name>runtime-mapping-singleton</name></codec-tree-factory><tcp-reconnect-strategy xmlns="urn:opendaylight:params:xml:ns:yang:controller:bgp:rib:impl"><type xmlns:x="urn:opendaylight:params:xml:ns:yang:controller:protocol:framework">x:reconnect-strategy-factory</type><name>example-reconnect-strategy-factory</name></tcp-reconnect-strategy><rpc-registry xmlns="urn:opendaylight:params:xml:ns:yang:controller:bgp:rib:impl"><type xmlns:x="urn:opendaylight:params:xml:ns:yang:controller:md:sal:binding">x:binding-rpc-registry</type><name>binding-rpc-broker</name></rpc-registry><data-provider xmlns="urn:opendaylight:params:xml:ns:yang:controller:bgp:rib:impl"><type xmlns:x="urn:opendaylight:params:xml:ns:yang:controller:md:sal:binding">x:binding-async-data-broker</type><name>pingpong-binding-data-broker</name></data-provider><local-as xmlns="urn:opendaylight:params:xml:ns:yang:controller:bgp:rib:impl">20</local-as><bgp-dispatcher xmlns="urn:opendaylight:params:xml:ns:yang:controller:bgp:rib:impl"><type>bgp-dispatcher</type><name>global-bgp-dispatcher</name></bgp-dispatcher><dom-data-provider xmlns="urn:opendaylight:params:xml:ns:yang:controller:bgp:rib:impl"><type xmlns:x="urn:opendaylight:params:xml:ns:yang:controller:md:sal:dom">x:dom-async-data-broker</type><name>pingpong-broker</name></dom-data-provider><schema-provider xmlns="urn:opendaylight:params:xml:ns:yang:controller:bgp:rib:impl"><type xmlns:x="urn:opendaylight:params:xml:ns:yang:controller:md:sal:dom">x:schema-service</type><name>yang-schema-service</name></schema-provider><local-table xmlns="urn:opendaylight:params:xml:ns:yang:controller:bgp:rib:impl"><type>bgp-table-type</type><name>ipv4-unicast</name></local-table><local-table xmlns="urn:opendaylight:params:xml:ns:yang:controller:bgp:rib:impl"><type>bgp-table-type</type><name>ipv6-unicast</name></local-table><local-table xmlns="urn:opendaylight:params:xml:ns:yang:controller:bgp:rib:impl"><type>bgp-table-type</type><name>linkstate</name></local-table><local-table xmlns="urn:opendaylight:params:xml:ns:yang:controller:bgp:rib:impl"><type>bgp-table-type</type><name>flowspec</name></local-table><local-table xmlns="urn:opendaylight:params:xml:ns:yang:controller:bgp:rib:impl"><type>bgp-table-type</type><name>vpnv4</name></local-table><bgp-rib-id xmlns="urn:opendaylight:params:xml:ns:yang:controller:bgp:rib:impl">10.42.88.65</bgp-rib-id></module>