SNMPTrap - All messages are in fallback

[rysavy.camea]

Hello,

I've got a problem with SNMPTrap in Zabbix 3.2.4 installed on Debian server. All SNMPTrap messages are inserted to SNMP_Trap_Fallback instead of being processed. Classic interval update of value of item is working fine.

Here is the example of message from Zabbix fallback:
2017-05-23 09:30:40
09:30:40 2017/05/23 PDU INFO:
messageid 0
version 1
errorindex 0
requestid 0
errorstatus 0
notificationtype TRAP
transactionid 137
receivedfrom UDP: [10.0.0.16]:161->[10.0.0.136]:162
community public
VARBINDS:
DISMAN-EXPRESSION-MIB::sysUpTimeInstance type=67 value=Timeticks: (6035714) 16:45:57.14
SNMPv2-MIB::snmpTrapOID.0 type=6 value=OID: unicam-4-14::unicamCabinetsUnitsGroupUnit-1IoSignalRelaysUnitsTblEntryAction.1

Here is the example of corresponding Zabbix item:
Name: Cabinet_1_IOSignal_Relays_1_Action
Type: SNMPv2 agent
Key: Cabinet_1_IOSignal_Relays_1_Action
Host interface: 10.0.0.16 : 161
SNMP OID: unicam-4-14::unicamCabinetsUnitsGroupUnit-1IoSignalRelaysUnitsTblEntryAction.1
SNMP community: public
...


Do you see any problem in the message? Do you have any idea how to pair the message with zabbix item?

Thank you.