FortiGate BGP polling - Only peers on last VDOM are correctly monitored

Hello,

On FortiGate multiple VDOM context, the discovery of BGP peers is correct but the polling isn't. Only peers of the last VDOMs are correctly monitored.

For example :

CMD[/usr/bin/snmpbulkwalk -Cr'20' -v2c -c '<Community>-<VDOM>' -Pud -OQUs -m BGP4-MIB -M /opt/observium/mibs/rfc:/opt/observium/mibs/net-snmp 'udp':'<hostname>':'161' bgpPeerState]

CMD EXITCODE[0]
CMD RUNTIME[0.0121s]
STDOUT[
bgpPeerState.10.255.4.92 = established
bgpPeerState.10.255.4.93 = established
bgpPeerState.10.255.4.133 = established
bgpPeerState.10.255.4.134 = established
bgpPeerState.78.153.231.172 = established
bgpPeerState.78.153.231.173 = established
]
SNMP STATUS[TRUE]

> $af_list /opt/observium/includes/polling/bgp-peers.inc.php:243
array()

SQL[SELECT * FROM `bgpPeers` WHERE `device_id` = '231']
ROWS[50]
SQL RUNTIME[0.00071716s]

Peer: 10.255.4.92 (State = , AdminStatus = )
[ polled 1666613815 -> period 54 ]
RRD /opt/observium/rrd/<hostname>/bgp-10.255.4.92.rrd already exists - no need to create.

RRD CMD[update <hostname>/bgp-10.255.4.92.rrd N:U:U:U:U:U --daemon unix:/var/run/rrdcached.sock]
RRD RUNTIME[0.0011s]
RRD STDOUT[OK u:0.01 s:0.00 r:0.84]
RRD_STATUS[TRUE]

SQL[UPDATE `bgpPeers` set `bgpPeerInUpdates` ='',`bgpPeerOutUpdates` ='',`bgpPeerInTotalMessages` ='',`bgpPeerOutTotalMessages` ='',`bgpPeerFsmEstablishedTime` ='',`bgpPeerInUpdateElapsedTime` ='',`bgpPeer_polled` ='1666613815' WHERE `bgpPeer_id` = '17100']
ROWS[0]
SQL RUNTIME[0.00026393s]
SQL WARNINGS[
 1366: Incorrect integer value: '' for column `observium`.`bgpPeers`.`bgpPeerInUpdates` at row 1
 1366: Incorrect integer value: '' for column `observium`.`bgpPeers`.`bgpPeerOutUpdates` at row 1
 1366: Incorrect integer value: '' for column `observium`.`bgpPeers`.`bgpPeerInTotalMessages` at row 1
 1366: Incorrect integer value: '' for column `observium`.`bgpPeers`.`bgpPeerOutTotalMessages` at row 1
 1366: Incorrect integer value: '' for column `observium`.`bgpPeers`.`bgpPeerFsmEstablishedTime` at row 1
 1366: Incorrect integer value: '' for column `observium`.`bgpPeers`.`bgpPeerInUpdateElapsedTime` at row 1
]
Passed incorrect value to format_uptime()

 > $uptime /opt/observium/includes/common.inc.php:1421
null
Passed incorrect value to format_uptime()

  /opt/observium/includes/common.inc.php:1421
null

Full dump (anonymized) attached.

I think the array $bgp_peers is erased by the content of the last VDOM and not completed step by step.

Regards,

Boris