RouterBOARD 941-2nD System rebooted because of kernel failure

Each time when i’m run zmap agains wan segment from host connected to lan segment RouterBOARD goes into reboot…
Tested on: RouterOS 6.30.4 and 6.31

Setup description:
/interface ethernet set ether1 name=ether1-gateway
/interface ethernet set ether2 name=ether2-local

/interface bridge add name=bridge-local disabled=no auto-mac=no protocol-mode=rstp
/interface bridge set “bridge-local” admin-mac=[/interface ethernet get ether2-local mac-address]
/interface bridge port add bridge=bridge-local interface=ether2-local

/ip dhcp-client add interface=ether1-gateway disabled=no

/ip address add address=192.168.88.1/24 interface=bridge-local
/ip pool add name=“default-dhcp” ranges=192.168.88.10-192.168.88.254
/ip dhcp-server add name=default address-pool=“default-dhcp” interface=bridge-local lease-time=10m disabled=no
/ip dhcp-server network add address=192.168.88.0/24 gateway=192.168.88.1
/ip dns {set allow-remote-requests=yes
static add name=router address=192.168.88.1}

/ip firewall nat add chain=srcnat out-interface=ether1-gateway action=masquerade

zmap runing on host connected to ether2-local: zmap -B 10M -p 80 -o jus_test_22.csv x.x.0.0/16
x.x.0.0/16 - wan segment
After 1-2 sec RouterBOARD goes into reboot.

After reboot log contains:
system,error,critical System rebooted because of kernel failure
system,error,critical router was rebooted without proper shutdown

Any suggestion?

P.S.
firewall rule are empty

Root cause found.
scran can handle only ~1800 open session (because lack of memory),
after reaching this threshold - memory are totally drain and router goes in to reboot.