pfSense

The LAGG interface member is cxl0 and cxl1,
if one of these interfaces is down, it triggers check_reload_status:

check_reload_status: Linkup starting cxl0
check_reload_status: Linkup starting cxl0
check_reload_status: Reloading filter
check_reload_status: Reloading filter

there is code to ignore such events on the BRIDGE interfaces:
https://github.com/pfsense/pfsense/blob/892d8a10810092f47bc417639a9d74346fe7bb28/src/etc/rc.linkup#L74

/* Take care of events on bridge members when IP is configured on bridge */
$bridge_if = link_interface_to_bridge($iface);
if (!empty($bridge_if) && empty($ipaddr) && empty($ip6addr)) {
    log_error("Ignoring link event for bridge member without IP config");

    return;
}

but not for the LAGG