showSeries/toggleSeries not working for box plot

[jackieleng]

Description

Toggling a series doesn't work for box plot. After you hide it, and then call showSeries (or just use toggleSeries), the plot is still hidden.

Steps to Reproduce

1. Create box plot series
2. Hide it with hideSeries
3. Show it again with showSeries (or use toggleSeries)

Expected Behavior

We should see the series again

Actual Behavior

Nothing is shown, series still hidden. Series data also seems to be deleted

Reproduction Link

https://codepen.io/jackieleng/pen/BaZOVeZ