I tried 1.10.7, 1.10.8 and am running 1.10.9 at the moment:
Version: v1.10.9
Build ID: 5166938
Build on: 02/13/19 18:11
Copyright: 2012-2018 Ubiquiti Networks, Inc.
HW model: EdgeRouter Pro 8-Port
HW S/N: *censored*
Uptime: 12:52:21 up 3:53, 1 user, load average: 0.09, 0.13, 0.27
All show the same problem.
Mar 25 12:45:19 routername BGP[6223]: BGP-3: [SOCK CB] sock_getpeer() failed (134:Transport endpoint is not connected), FD(12)
Mar 25 12:45:42 routername BGP[6223]: BGP-3: [SOCK CB] sock_getpeer() failed (134:Transport endpoint is not connected), FD(12)
Mar 25 12:47:16 routername BGP[6223]: BGP-3: [SOCK CB] sock_getpeer() failed (134:Transport endpoint is not connected), FD(12)
Mar 25 12:47:35 routername BGP[6223]: BGP-3: [SOCK CB] sock_getpeer() failed (134:Transport endpoint is not connected), FD(12)
Mar 25 12:48:58 routername BGP[6223]: BGP-3: [SOCK CB] sock_getpeer() failed (134:Transport endpoint is not connected), FD(12)
Mar 25 12:49:30 routername BGP[6223]: BGP-3: [SOCK CB] sock_getpeer() failed (134:Transport endpoint is not connected), FD(12)
Mar 25 12:50:41 routername BGP[6223]: BGP-3: [SOCK CB] sock_getpeer() failed (134:Transport endpoint is not connected), FD(12)
Mar 25 12:51:19 routername BGP[6223]: BGP-3: [SOCK CB] sock_getpeer() failed (134:Transport endpoint is not connected), FD(12)