We faced the similar issues, couple of spoke sites lost connectivity to servers hosted in AWS behind VMX HUB. When we verify the event logs - we observed below event logs ,
Feb 19 17:21:41 BGP session established peer_ip: 10.184.54.1, local_as: 64512, remote_as: 64512
Feb 19 17:21:38 Route connection change peer_type: l3_vpn, peer: 0C:8D:DB:C0:17:80, connection_status: connected
Feb 19 17:21:33 VPN tunnel connectivity change vpn_type: site-to-site, peer_contact: 96.9.177.27:59038, connectivity: true
Feb 19 17:21:27 BGP session no longer established peer_ip: 10.184.54.1, local_as: 64512, remote_as: 64512 more »
Feb 19 17:21:27 BGP received notification peer_ip: 10.184.54.1, local_as: 64512, remote_as: 64512 more »
Feb 19 17:21:18 Route connection change peer_type: l3_vpn, peer: 0C:8D:DB:C0:17:80, connection_status: down
Can some one explain, is it because of this spoke sites been down ?