When a map is opened to the full screen view there's an offset applied to the center point of the map that's supposed to adjust the viewport of the map when the footer or sidebar overlap the view. This offset is/was responsible for at least two problems that became more visible with the flexible footer calculation and the fact that the footer can have an almost arbitrary height ( T333160: On narrow screens "External maps" footer button vanishes ):
- There is a visible jump when the offset was applied T335779: Map focus jumps when map is opened another time ( fixed )
- The center of the interactive map moves when opened and closed ( fixed )
- The offset calculation is inaccurate with the new way the footer is styled. ( fixed )