The firewalls seemed to have been working fine and we don't see any performance drop or traffic loss during this time but just the SNMP issue. Looking at the logs I see messages LIBJSNMP_NS_LOG_INFO which I will attach screenshots of during the time of the issue and I also see an alarm at 10:39 which ended at 10:40 reason Potential slow peers are: FWDD0.

Messages:

Nov 28 10:34:19 SRX-FH1 snmpd[25554]: LIBJSNMP_NS_LOG_INFO: INFO: AgentX session, /var/run/mib2d-28, noticed 1 request timeout.

Nov 28 10:35:06 SRX-FH1 snmpd[25554]: SNMPD_SEND_FAILURE: jnx_netsnmp_udp_send: send message (10.254.231.12) failure: No route to host

Nov 28 10:35:13 SRX-FH1 mgd[40325]: PVIDB: Attribute 'license.agile_infra_supported' not present in Db

Chassisd:

Nov 28 10:39:36 send: yellow alarm set, device Routing Engine 0, reason Potential slow peers are: FWDD0 

Nov 28 10:40:26 send: yellow alarm clear, device Routing Engine 0, reason Potential slow peers are: 

Please refer to this documentation:

https://www.juniper.net/documentation/us/en/software/junos/network-mgmt/topics/topic-map/tracing-snmp-activity.html#id-monitoring-snmp-activity-and-tracking-problems-that-affect-snmp-performance-on-a-device