Overview

Items set for 1m polling are gathering 3 samples of the data at a single time per agent Logs and Latest Data. This has lead to issues for some custom items that parse JSON data to dynamically create/populate Items/Triggers (LLD), where 1 or more of the 3 samples are truncated (incomplete JSON payload).

Steps to reproduce:

1. Updated from Zabbix Agent2 6.0.x to 7.0.x
2. Monitor log and/or Latest Data to observe an Item configured for 1m sampling is gathering 3 samples of the data (sometimes with error / truncation for larger payloads)

1. 1. Example, "chronyd.service: Get unit info" managed by "Service units discovery" LLD rule
2. Downgrade back to Zabbix Agent2 6.0.x
3. Monitor log and/or Latest Data to observe an Item configured for 1m sampling gathers 1 (and only 1) sample

Result:
While only 1 sample is expected, 3 are getting collected in same minute (Screenshot). 

Expected: 1 Item sample per polling interval