Hi ,
I got VyOS 1.1.7
There are many bgp sessions on that router.
I have two with two route servers (using attribute unchanged as-path) of the same IX - the same AS Number.
From time to time - randomly - once in a mounth - i hav such a problem that one session is doubled.
http://pastebin.com/raw/eSJexUVb
Shutting down = no result, remove - no result. Only reboot of the whole device solves the problem.