Annotations label edit makes the text dissapear

[kamil-musialowski]

Actual behaviour

After adding the label annotation and editing it through annotations GUI (even without changing any parameters) makes the text inside the label disappear.

Live demo with steps to reproduce

https://jsfiddle.net/BlackLabel/hd49nfum/

Click on the TXT icon to add the simple label to the chart
Click on the label
Click the pencil icon to edit it
Click save button (you don't have to change any data)

Product version

Highstock 11.0.1 (latest)

Internal note

Regression, last working version 10.3.3

[pawelfus]

Workaround:

Demo: https://jsfiddle.net/BlackLabel/hd49nfum/2/

Plugin:

(function(H) {
  H._modules['Extensions/Annotations/NavigationBindings.js'].prototype.fieldsToOptions = function(
    fields,
    config
  ) {
    H.objectEach(fields, (value, field) => {
      const parsedValue = parseFloat(value),
        path = field.split('.'),
        pathLength = path.length - 1;

      // If it's a number (not "format" options), parse it:
      if (
        H.isNumber(parsedValue) &&
        !value.match(/px|em/g) &&
        !field.match(/format/g)
      ) {
        value = parsedValue;
      }

      // Remove values like 0
      if (value !== 'undefined') {
        let parent = config;

        path.forEach((name, index) => {
          const nextName = H.pick(path[index + 1], '');

          if (pathLength === index) {
            // Last index, put value:
            (parent)[name] = value;
          } else if (!(parent)[name]) {
            // Create middle property:
            (parent)[name] = nextName.match(/\d/g) ? [] : {};
            parent = (parent)[name];
          } else {
            // Jump into next property
            parent = (parent)[name];
          }
        });
      }
    });
    return config;
  }
})(Highcharts);

Internal note:
Bug in regexp - missing em in the regexp here: !value.match(/px/g)