Editing statistic has no effect

I have a gas import meter on the energy dashboard, which annoyingly (and frequently) spikes causing an error in statistics - e.g. it suddenly things I’ve used £125,000 of gas in a minute.
I usually just use the statistics editor in dev tools to correct this, but I have one that refuses to budge:
In the dashboard:

Yet when i edit statistics for that sensor in dev tools:

Im not sure what is going on here, or if this is a “bug”?

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