7.42 BGP Conditional Route Injection

Hello, I have a question about the delay in why the injected route goes from inactive to active in the BGP table, here is the config I have placed on R6(R4's is exactly the same except the "INJ" prefix is different):

ip prefix-list AGG seq 5 permit 10.0.0.0/22
!
ip prefix-list INJ seq 5 permit 10.0.2.0/24
!
ip prefix-list SOURCE seq 5 permit 155.5.146.1/32
!
route-map INJ permit 10
 set ip address prefix-list INJ
!
route-map EXIST permit 10
 match ip address prefix-list AGG
 match ip route-source prefix-list SOURCE
!
router bgp 100
 bgp inject-map INJ exist-map EXIST copy-attributes
!

I have tried to force the bgp table to clear and in some cases it has taken 2-3 minutes for the "sh ip bgp inj" to return any output, just as a verification:

Rack5R6(config-router)#do sh ip bgp 10.0.0.0 255.255.252.0
BGP routing table entry for 10.0.0.0/22, version 2
Paths: (2 available, best #2, table Default-IP-Routing-Table)
  Advertised to update-groups:
        2
  300 200, (aggregated by 200 150.5.2.2)
    155.5.67.7 from 155.5.67.7 (150.5.7.7)
      Origin IGP, localpref 100, valid, external, atomic-aggregate
  200, (aggregated by 200 150.5.2.2)
    155.5.13.3 (metric 27260160) from 155.5.146.1 (150.5.1.1)
      Origin IGP, metric 0, localpref 100, valid, internal, atomic-aggregate, best
Rack5R6(config-router)#

Any ideas?