I'm not sure this is the right place to submit bug. Please correct me if I'm wrong ;). Attached is the result I need to achieve. The markers shown when hovering a point is buggy and does not honour all my settings. What I need for achieve the result is a white background and a blue stroke (border).
If I set the option "visible" to true, then all the markers are visible when the chart is loaded and all the settings are honoured. However, when I set visible to false and hover a data point, only the border (and size) is honoured. The background is not, hence it's the wrong result. This is clearly a bug as all parameters are honoured in both modes (visible = true or false) but only the background is not.
I've tried to set those settings in the "series.highlight" section, without more luck.
Currently, the only solution to this problem is specifying the stroke-fill and fill into the CSS, which is not the cleanest way to do it.