It seems that since a few days, the results page for challenges loads new results as they come in using Javascript every 60 seconds or so. This also means the map position and zoom level is reset, presumably to include new players in the map view. (And/or when the page loses and gains focus?) This is disruptive if you're zoomed in to look at something. I would prefer that loading new players would not reset the position. A reasonable compromise might be to only reset the map position if there's a change in the highscore list, which would at least make it not reset periodically for no visible reason.

This was observed on the Daily Challenge result page, but I assume all challenges work the same.