Annotations label artifact

[tanguyvda]

Codepen

https://codepen.io/anon/pen/ZZRoEY

Explanation

I'm not quite sure if it is a bug or if I'm missing something.
When you leave the annotation label empty, it still displays a small rectangle in the top left corner of the chart. I've tried to play with opacity and other options to hide it but none of them seemed to work.

• What is the behavior you expect?
  if I enable annotations and leave an empty label (or undefined value), I do not want any annotations label relative content to be displayed

• What is happening instead?
  the label is not displayed but I have an artifact in the top left corner of the chart

• Use case
  I want my users to be able to disable the annotation label because in some cases it can hide the data.
  

[junedchhipa]

Cool, I will make sure not to draw anything if label is empty string.