BGP Answers

Thank you so much for answering my question!
I've got one more, if you don't mind.
I have a following topology
Cisco C3750X stack: advertises networks 10.5.0.0/24, 10.5.1.0/24, 10.5.4.0/23 and 10.5.6.0/23 to BGP.
Mikrotik CCR2116 (ROS 7.14.3): is connected to Cisco C3750X via 10.5.0.0/24 network and has iBGP adjacency with it. Also, has a GRE tunnel to Mikrotik CCR1009 with internal tunnel addressing 172.31.1.0/30, where OSPF (area 0) is established.
Mikrotik CCR1009 (mentioned above, with ROS6): tunnel to CCR2116 mentioned above with OSPF inside of it, and it learns a huge amount of OSPF routes from the rest of the network.
CCR2116 (mentioned above) has redistribution from BGP to OSPF and backwards configured in the following way: it has an address list BGP_OUT which, for now, has only networks 10.5.0.0/24, 10.5.1.0/24, 10.5.4.0/23 and 10.5.6.0/23, redistributes addresses in this list from BGP to OSPF via out filter, and learns (and distributes to BGP backwards) everything NOT in this list via OSPF in filter.
Everything seems to be working fine, except for one detail. The issue is that BGP redistributes to OSPF everything in the BGP_OUT list except 10.5.0.0/24 network, which is listed as BGP route in the CCR2116 route table but is labeled as inactive, because it is already listed there as connected route. If I enable "redistribute connected" to OSPF, it works.
I wonder if it's a normal behavior for BGP and OSPF (not redistributing an inactive, yet existing BGP route) or a Mikrotik bug?
Thanks in advance!