Explicit router provided for L3 Policy creation is not used

I'm not able to reproduce this using the resource_mapping policy driver. See below. I'm changing the status to incomplete.

[rkukura@localhost devstack]$ neutron router-create r1
Created a new router:
+-----------------------+--------------------------------------+
| Field | Value |
+-----------------------+--------------------------------------+
| admin_state_up | True |
| external_gateway_info | |
| id | cf3e2943-89f6-4d0f-829d-3b76c1903886 |
| name | r1 |
| routes | |
| status | ACTIVE |
| tenant_id | 06bc0332286e4287914202f1521fb271 |
+-----------------------+--------------------------------------+
[rkukura@localhost devstack]$ gbp l3p-create --routers cf3e2943-89f6-4d0f-829d-3b76c1903886 l3p2
Created a new l3_policy:
+----------------------------+--------------------------------------+
| Field | Value |
+----------------------------+--------------------------------------+
| description | |
| external_segments | {} |
| id | 2f4c3579-6e30-4160-89ad-a338ec14bbbb |
| ip_pool | 10.0.0.0/8 |
| ip_version | 4 |
| l2_policies | |
| name | l3p2 |
| proxy_ip_pool | 192.168.0.0/16 |
| proxy_subnet_prefix_length | 29 |
| routers | cf3e2943-89f6-4d0f-829d-3b76c1903886 |
| shared | False |
| subnet_prefix_length | 24 |
| tenant_id | 06bc0332286e4287914202f1521fb271 |
+----------------------------+--------------------------------------+
[rkukura@localhost devstack]$ gbp l2p-create --l3-policy l3p2 l2p1
Created a new l2_policy:
+----------------------+--------------------------------------+
| Field | Value |
+----------------------+--------------------------------------+
| description | |
| id | f32b98c5-352a-4bbe-bc31-10fcca3f2941 |
| l3_policy_id | 2f4c3579-6e30-4160-89ad-a338ec14bbbb |
| name | l2p1 |
| network_id | a47cb05e-8bf4-40a9-a6e3-e3ad8edbc920 |
| policy_target_groups | |
| shared | False |
| tenant_id | 06bc0332286e4287914202f1521fb271 |
+----------------------+--------------------------------------+
[rkukura@localhost devstack]$ gbp ptg-create --l2-policy l2p1 ptg1
Created a new policy_target_group:
+---------...