Tooltip not triggering on mean line

[rowanwins]

I'm using this library to make a strip plot - even though it's not it's intended use it's working really well, so thank you!

One issue I'm having is that I'd like to display a tooltip on hover of the mean line, however this doesn't seem to work. Tooltips are triggered when hovering over an item, but not the mean line.

Any ideas appreciated :)