First of all, thanks for a splendid service!
We have used the isochrone feature to determine the population inside a catchment area defined by an isochrone. However, there seems to be a bug somewhere, that was quite possibly fixed a few months back.
When running the isochrone for a specific set of coordinates a few months back, an estimated population was returned together with the polygon (I saved the geojson file)
When running the same set of coordinates now with the same settings, the exact same polygon is returned. However, the population figure is significantly lower (+/- 20% depending on location). It seems like the new number if the correct one however.
Has something been done on this functionality or the dataset that could explain this behaviour?