Reproduce:
Import attach export-file to zabbix or:
Create host 'test-host'
Create data element 'alarm.main' with data throttling of 4 hours
Create data element 'alarm.second' with data throttling of 4 hours
Create trigger for element 'alarm.main' as last=1
Create trigger for element 'alarm.second' as last=1
Create trigger 'alarm.second' dependency on 'alarm.main'

1. send value 1 for element 'alarm.main' via zabbix_sender. Trigger state becomes 'PROBLEM'. Trigger is displayed.
2. send value 1 for element 'alarm.second' via zabbix_sender. Trigger state remains unchanged (status OK).
Expected: Trigger state 'alarm.second' changes to 'PROBLEM'. Trigger is not displayed (dependency).

3. Send 0 via zabbix_sender for 'alarm.main' element. Trigger state has changed to 'OK'. Trigger has been resolved.
Bug: Trigger for 'alarm.second' is not displayed; it is in 'OK' state (false positive).
4. Send 1 via zabbix_sender for 'alarm.second' element. Trigger state has not changed (data throttling).
Expected: trigger 'alarm.main' has been resolved. Trigger 'alarm.second' is displayed in problem state.

Using this scenario with dependencies and data throttling, we cannot detect a problem in 'alarm.second'.
Similarly, 'alarm.second' trigger does not change to resolved state if:
Send 1 via zabbix_sender for 'alarm.second' element
Send 1 via zabbix_sender for 'alarm.main' element
Send 0 via zabbix_sender for 'alarm.second' element
Send 0 via zabbix_sender for 'alarm.main' element