Grafana values are not reported correctly to the dashboard

I have the following question:
In Grafana itself, my data is correct - see here:

However, my dashboard looks like this:

The refresh interval in Grafana is set to 1 minute. So all the records are correct in Grafana. Only in the dashboard it doesn’t update and I don’t understand why.
Is integrated via the embedded link:

    width="100%" height="100%" frameborder="0"></iframe>

Can someone tell me what it could be?

Addendum: Now that I’ve waited a bit, this display suddenly appears in the dashboard, but it doesn’t match Grafana either:

It would be great if someone could help me here.