Yes, a forced restart of the FRR service can restore functionality; sometimes, two forced restarts are required to get it working again. They are remote BGP connections made via VPN tunnels.
BGP neighbor is 2602:fed:7020:a::2, remote AS 39703, local AS 65105, external link
Local Role: undefined
Remote Role: undefined
Description: FMT VP
Hostname: changeme
BGP version 4, remote router ID 0.0.0.0, local router ID 10.50.1.254
BGP state = Idle
Last read 01:46:26, Last write 01:46:23
Hold time is 180 seconds, keepalive interval is 25 seconds
Configured hold time is 180 seconds, keepalive interval is 25 seconds
Configured tcp-mss is 0, synced tcp-mss is 0
Configured conditional advertisements interval is 60 seconds
Graceful restart information:
Local GR Mode: Disable*
Remote GR Mode: NotApplicable
R bit: False
N bit: False
Timers:
Configured Restart Time(sec): 120
Received Restart Time(sec): 120
Configured LLGR Stale Path Time(sec): 0
Message statistics:
Inq depth is 0
Outq depth is 0
Sent Rcvd
Opens: 3 3
Notifications: 59 0
Updates: 3 567673
Keepalives: 1919 799
Route Refresh: 0 0
Capability: 0 0
Total: 1984 568475
Prefix statistics:
Inbound filtered: 0
AS-PATH loop: 0
Originator loop: 0
Cluster loop: 0
Invalid next-hop: 0
Withdrawn: 0
Attributes discarded: 0
Minimum time between advertisement runs is 10 seconds
Update delay timer is 20 seconds (remaining: 0)
Update source is 2602:fed:7020:a::3
For address family: IPv6 Unicast
Not part of any update group
Inbound soft reconfiguration allowed
NEXT_HOP is always this router
Community attribute sent to this neighbor(all)
Outbound path policy configured
Outgoing update prefix filter list is *myv6out
0 accepted prefixes
Connections established 1; dropped 1
Last reset 01:45:58, Notification sent (Neighbor Events Error/Unspecific)
Message received that caused BGP to send a NOTIFICATION:
FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF
00690104 9B4900B4 1781205A 4C020601
04000200 01020202 00020246 00020641
0400009B 49020206 00020645 04000201
0302074C 05000201 0000020C 490A0863
68616E67 656D6500 02044002 40780209
47070002 01800000 00
External BGP neighbor may be up to 1 hops away.
Local host: 2602:fed:7020:a::3, Local port: 19658
Foreign host: 2602:fed:7020:a::2, Foreign port: 179
Nexthop: 0.0.0.0
Nexthop global: 2602:fed:7020:a::3
Nexthop local: ::
BGP connection: shared network
BGP Connect Retry Timer in Seconds: 300
Next start timer due in 64 seconds
Peer Authentication Enabled
Read thread: off Write thread: off FD used: -1