When i use stackLabels with useHTML:true and show a image, the tooltip should have more z-index than the stackLabels
stackLabels with useHTML:true and show a image in, the tooltip of the chart is behind of the image of stackLabel (image).
Chrome
Hi @fedegara
This is not a bug. HTML is rendered on top of the SVG, so tooltip will be below the HTML images. You can read details in our docs.
Workaround
The solution is disable Highcharts tooltip and use CSS version.
Thanks @pawelfus and @sebastianbochan for the solution. this save my day