CCR1036 12G4s rOS 6.34.1 Crash each 2 weeks

hi, i have received two CCR1036-12g-4s

the first has been update to 6.34.4, System Routerboard Firmware: 3.27

this one it has triple traffic compared the second one and has a bridge that was connected to a layer2 ring topology running STP, at first works perfectly but 4 hours later Crash, and cannot access, cant do mac-winbox cant do anything, you have to disconnect the CCR to started again,

the second one has the version 6.34.1, System Routerboard Firmware 3.27

and the same config in a ring topology running spanning tree protocol, and the same at first works perfectly, but 2 weeks later crash and the same prognostic CCR no traffic coursing,

this is the configuration

jan/09/1970 13:23:43 by RouterOS 6.34.1

/interface bridge
add name=Br-Anillos
/interface vlan
add interface=Br-Anillos name=gTbus_304 vlan-id=304
/snmp community
add addresses=0.0.0.0/0 name=“Di”
/interface bridge port
add bridge=Br-Anillos interface=ether1
add bridge=Br-Anillos interface=sfp1
add bridge=Br-Anillos interface=sfp2
add bridge=Br-Anillos interface=ether2
/ip address
add address=192.168.96.59/28 interface=gTbus_304 network=192.168.96.48
add address=192.168.88.1/24 interface=ether12 network=192.168.88.0
/ip route
add distance=1 gateway=192.168.96.49
/snmp
set enabled=yes trap-community=“Di”
/system routerboard settings
set cpu-frequency=1200MHz memory-frequency=1066DDR


Any help?