Am I missing something or it’s a bug?

Idea is following. I’m using dispatcher to load-balance calls. Using same weight destinations, order like in a file.

So, dispatcher.list looks like 

1 sip:172.28.11.6:5060

1 sip:172.28.11.4:5060

I’m using round-robin algo with 

ds_select_dst(«1», «4»)

But when it selects 172.28.11.4 and it for a reason not working, it will never come back to 172.28.11.6.

Log: 

… Relaying packet du: sip:172.28.11.4:5060

… BYE/INVITE timeout with no reply

… 49(59) WARNING: dispatcher [dispatch.c:2314]: ds_update_dst(): no xavp uri field in next destination record ((nil))

modparam("dispatcher", "list_file", "/tmp/kamailio/dispatcher.list")
modparam("dispatcher", "flags", 2)
modparam("dispatcher", "force_dst", 1)
modparam("dispatcher", "ds_hash_size", 9)

Kamailio: version: kamailio 5.2.0-pre0