Global correlation doesn't work if events are created at the same time.

To reproduce:

1. Create test item with key:
test
and type Zabbix trapper
2. Create anoter test item with key:
test2
and type Zabbix trapper
2. Create two triggers. both with exactly the same expression:

{host:test.last()}=0

add Tag called 'Test' with no value.

3. Create another trigger with expression:

{host:test2.last()}=0

add Tag called 'Test' with no value.

4.Create global correlation rule:
with conditions:

and action: 'close new event'

5. Now , from console run zabbix_sender cli:

zabbix_sender -z 127.0.0.1 -s "Zabbix server" -k test -o 0

you would see that both triggers are created active .

NOT CORRELATED as expected!

6. Now run:

zabbix_sender -z 127.0.0.1 -s "Zabbix server" -k test2 -o 0

Because of time delay between 5 and 6, you would see that new event from third trigger is correlated properly.

Same issue is seen with some real SNMP based triggers