Energy dashboard stuck

I just configured my energy dashboard and not long after that it got stuck and refuses to get unstuck no matter what I do. On statistics you can see that the sensor is working and it keeps registering (now at 2,7kwh). However, the energy dashboard got stuck at 0,74kwh. What can I do to reset it?

Having used it now for a while I notice it does update, however very slowly, maybe once every 60min. Is this normal behaviour? Everything else in HA is so snappy that this seems a bit wrong. Any way to speed it up?