search: changing site timezone offset for daylight saving shifts data on search page graph

I was looking at the battery voltage graphs for debugging ESP power problems and yesterday the ESP was shown to stop around midday.
I changed the site timezone to account for daylight saving (from 10.5 to 9.5), and then looking at the graphs this morning I noticed that the time on the graph for battery voltage was shown to be 1 hour earlier for the same data.

I know this could be a bit complicated to sort out since the shift means data is either overlapping or there's a gap in data, but some sort of mismatch at daylight saving change time would be better than showing historical data at a shifted time.