Zabbix Agent 2 receiving MQTT messages but not receiving them in server

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Issue: Subscribed MQTT Values not arriving in Zabbix Server.

I have configured an item to get messages published via mqtt
Zabbix agent log showes that the agent subscribed and is receiving values:

Latest Data im Zabbix WebGui does not show anything:
But I'm receiving other values for the same host:

zabbix_agent2.conf

PidFile=/run/zabbix/zabbix_agent2.pid
LogFile=/var/log/zabbix/zabbix_agent2.log
LogFileSize=512
DebugLevel=5
Server=127.0.0.1
ListenPort=10050
ServerActive=127.0.0.1:10051
HostnameItem=system.hostname
RefreshActiveChecks=300
BufferSend=3600
BufferSize=256
Plugins.MQTT.Default.Url=tcp://localhost:1883
Plugins.MQTT.Default.User=zabbix
Plugins.MQTT.Default.Password=securepassword

Versions
zabbix_server (Zabbix) 7.0.3

zabbix_agent2 (Zabbix) 7.0.3
Revision d93ce022627 19 August 2024, compilation time: Aug 19 2024 11:20:25, built with: go1.22.6
Plugin communication protocol version is 6.4.0

Plugin used: https://www.zabbix.com/integrations/mqtt#mqtt

I tried without success:
- Delete template and add it again
- Restarted everything multiple times
- Checked Debug Logs

Does anyone has an idea?