Artefacts appears, when redraw flag is false
Worked in 4.2.5. http://jsfiddle.net/dets6joh/1/
Animations are supported since 4.2.6, in 4.2.5 didn't exist.
Minified demo: http://jsfiddle.net/4acv8904/
Looks like something is wrong with sixify. Or not.. Standalone Highcharts use case: http://jsfiddle.net/gyq22jf3/ - this is what happens when we have a click on the button: default animation (null-param) and then another animation in afterSetExtremes. Extra issue: errors in JS console.
Fixed #5788, artifacts when animating splines before previous animati…
…on was done.