Steps to reproduce:

1. Use the kubernetes integration helm chart installing zabbix agent and proxy
2. Apply Kubernetes cluster state by HTTP and Kubernetes nodes by HTTP
3. Start collecting metrics/items using 

name: 'Kubernetes: Get state metrics'
type: SCRIPT
key: kube.state.metrics
value_type: TEXT

1. Add some history and test : get state metrics.

Result:
See screenshot : the result is truncated at 65535 characters 

Check Text data limits as per documentation https://www.zabbix.com/documentation/current/en/manual/config/items/item

So out of10480 lines (checked by port-forward svc/zabbix-agent-kube-state-metrics and getting the metrics) zabbix is ingesting only 643 lines of my metrics.

Resulting in data missing for a lot of items.

Saw this issue while testing/forcing a pending pvc. The trigger 'PVC discovery ... PVC is pending' was not issuing/provoking a problem as it had no data in its item. 

Expected:
All items getting data values.