Spurious spike in Current Power chart

[smoothquark]

I have only recently installed HA and this integration. Thank you for the integration. I have been looking at the power usage chart for the last few days and have attached the latest one. At midnight, there is a large spike, which I think indicates the total for the previous day. Not sure if the integration is causing this or a bug within Home Assistant. I wonder if anyone else has been seeing the same?