Steps to reproduce:

1. Create host that monitors Zabbix 6.0.9 proxy using remote template.
2. Wait for data, items "Remote Zabbix proxy: Utilization of data sender internal processes, in %" and "Remote Zabbix proxy: Utilization of heartbeat sender internal processes, in %" become unsupported

Result:
I tested JSON output from "Remote Zabbix proxy: Zabbix stats" master item (key zabbix[stats,\{$ZABBIX.PROXY.ADDRESS},\{$ZABBIX.PROXY.PORT}]) and it does not contains data for two forementined Items. Other items in template works well. The JSON content is attached to this ticket. The processes really exists on the proxy and works well, only they missing in remote monitoring JSON
Expected:

JSON master file contains missing metrics and everybody are happy.