I won't suggest you to upgrade all the firewalls together. In case of
any issue with Firmware, you will have downtime or issues across all
firewalls. So let it be different.
This is an local-out traffic, and does not pass via normal Firewall
policy. It uses configured local in-traffic policies. you need to enable
ha-direct if the firewall is in a HA group. Check more details below.
config system haset ha-direct
enableend...
Check the number of sessions or if there are some attacks being
triggered. The issue occurs when suddenly there is a spike on the number
of sessions. Visit the video below to understand the conserve mode and
possible issues. https://youtu.be/rtrg3fI5...