My energy graphs show 23 bars each day. I am missing the bar for 23pm-0am. I think (I hope) it's only a display issue, because costs per day seem to be correct, but not 100% sure about that.
this is a known HA bug, not your setup. It's tracked as core issue #170418, "Energy data between 23:00 and 00:00 missing in Energy Dashboard", a regression that appeared around 2026.5.1. It specifically drops the 23:00–00:00 column, so the chart jumps from 22:00–23:00 straight to the next day's 00:00–01:00, leaving 23 bars instead of 24. Exactly what you're seeing.
check Developer Tools → Statistics for that hour, but your costs adding up already proves it.
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