Version

4.7.0

Reproduction link

https://jsfiddle.net/758vs6xe/

Steps to reproduce

You have an xAxis of type category and you have a bar series. And you want to markArea of a specific category. You can't because the markArea starts drawing from the center of the bar.

In the example we have the days of the week as categories.
With markArea 'Mon' - 'Tue' you see something.
With markArea 'Wed' - 'Wed' you see nothing.

What is expected?

For markArea to mark the specific bar category.

What is actually happening?

It doesn't mark it.