For some reason the use_kwh feed reset itself at some point. It took place when the electrician came to install a new consumer unit for an EV car. Not entirely sure the exact reason for it however.
You can see it in this graph:
Unfortunately this means that the graph for daily consumption is now gone awry:
This also affects the electricity app, where the y scale for the daily consumption is all squashed:
Is there a way to fix this?