Power meters don't give actual data

Hello all,
I am creating a dashboard. I therefore have three meters on which I could read the power consumption. The values ​​that are displayed only change occasionally and do not indicate the current consumption. As soon as I press the meter, I see the correct values ​​in the graph over the past period. Of course I would like to see the current data. Can someone tell me what I’m doing wrong here?
thankx Peter