OpenVPN + OSPF: kernel or connected routes?

[bazbaz]

Hi,
I need to distribute via OSPF IPs assigned to dialup clients connected via OpenVPN tunnels. I noticed that on some OPNSense I find these addresses in routing table as "kernel", on some others I find them as "connected". So, sometimes I need to arrange config to redistribute connected routes, sometime kernel. Why?
Is there something wrong in my settings?

Basically I need to make IPs con connected client distributes to other routers via OSPF.

thanks