Steps to reproduce:

1. Create an item with the following item key

   eventlog[Application,,,,100,,skip]
   

2. Create an event by executing the following command at Monitoring target(Windows)

   eventcreate /ID 100 /L Application /SO kmizutani /T Information /D "Test 001"
   

3. Confirm that the created event at "2." is collected by Zabbix server
   (Nth initialize_eventlog6() execution)
4. Change the 5th parameter of the item key as follows:

   eventlog[Application,,,,200,,skip]
   

5. Configuration cache reload of zabbix server

   # zabbix_server -R config_cache_reload
   

6. Create an event by executing the following command at Monitoring target(Windows)

   eventcreate /ID 200 /L Application /SO kmizutani /T Information /D "Test 002"
   

7. Zabbix Agent2 send active checks request
8. N+1th initialize_eventlog6() execution
9. Create an event by executing the following command at Monitoring target(Windows)

   eventcreate /ID 200 /L Application /SO kmizutani /T Information /D "Test 003"
   

10. N+2th initialize_eventlog6() execution

Result:

Event "Test 001" and "Test 003" is collected, but "Test 002" is not collected.

Expected:

Event "Test 001", "Test 002" and "Test 003" is collected.

In the case of Zabbix agent, "Test 001", "Test 002" and "Test 003" is collected correctly.