Shows a bug with getSelection content controls

Content control basics.WORD.yaml

name: Content control basics
description: Shows a bug with getSelection content controls
host: WORD
api_set: {}
script:
  content: >
    $("#output-paragraph-controls").click(() =>
    tryCatch(outputParagraphContentControls));

    $("#output-selection-controls").click(() =>
    tryCatch(outputSelectionContentControls));

    $("#output-selection-control").click(() =>
    tryCatch(outputSelectionContentControl));

    $("#output-controls").click(() => tryCatch(outputContentControls));


    async function outputContentControls() {
      await Word.run(async (context) => {
        let contentControls = context.document.contentControls;

        await loadContentControls(context, contentControls);

        await context.sync();

        logContentControls(contentControls);
      });
    }


    async function outputParagraphContentControls() {
      await Word.run(async (context) => {
        let selection = context.document.getSelection();
        context.load(selection.paragraphs, "*");
        await context.sync();

        let contentControls = selection.paragraphs.getFirst().contentControls;

        await loadContentControls(context, contentControls);

        logContentControls(contentControls);
      });
    }


    async function outputSelectionContentControls() {
      await Word.run(async (context) => {
        let contentControls = context.document.getSelection().contentControls;

        await loadContentControls(context, contentControls);

        logContentControls(contentControls);
      });
    }


    async function outputSelectionContentControl() {
      await Word.run(async (context) => {
        // let contentControls = context.document.getSelection().contentControls;
        let contentControl = context.document.getSelection().parentContentControlOrNullObject;

        await loadContentControls(context, contentControl);

        logContentControl(contentControl);
      });
    }


    async function loadContentControls(ctx, contentControls) {
      ctx.load(
        contentControls,
        "appearance," +
          "cannotDelete," +
          "cannotEdit," +
          "color," +
          "id," +
          "placeHolderText," +
          "removeWhenEdited," +
          "title," +
          "text," +
          "type," +
          "style," +
          "tag," +
          "font/size," +
          "font/name," +
          "font/color"
      );

      await ctx.sync();
    }


    function logContentControls(contentControls) {
      for (let i = 0; i < contentControls.items.length; i++) {
        logContentControl(contentControls.items[0]);
      }
    }


    function logContentControl(contentControl){
      console.log(
        "Property values of the first content control:" +
        "   ----- appearance: " +
        contentControl.appearance +
        "   ----- cannotDelete: " +
        contentControl.cannotDelete +
        "   ----- cannotEdit: " +
        contentControl.cannotEdit +
        "   ----- color: " +
        contentControl.color +
        "   ----- id: " +
        contentControl.id +
        "   ----- placeHolderText: " +
        contentControl.placeholderText +
        "   ----- removeWhenEdited: " +
        contentControl.removeWhenEdited +
        "   ----- title: " +
        contentControl.title +
        "   ----- text: " +
        contentControl.text +
        "   ----- type: " +
        contentControl.type +
        "   ----- style: " +
        contentControl.style +
        "   ----- tag: " +
        contentControl.tag +
        "   ----- font size: " +
        contentControl.font.size +
        "   ----- font name: " +
        contentControl.font.name +
        "   ----- font color: " +
        contentControl.font.color
      );
    }


    /** Default helper for invoking an action and handling errors. */

    async function tryCatch(callback) {
      try {
        await callback();
      } catch (error) {
        // Note: In a production add-in, you'd want to notify the user through your add-in's UI.
        console.error(error);
      }
    }
  language: typescript
template:
  content: "<section class=\"ms-font-m\">\n\tThis sample demonstrates an issue with getSelection().contentControls.\n</section>\n\n<section class=\"samples ms-font-m\">\n\t<h3>Try it out</h3>\n\t<button id=\"output-controls\" class=\"ms-Button\">\n    <span class=\"ms-Button-label\">Output content controls</span>\n  </button>\n\t<button id=\"output-paragraph-controls\" class=\"ms-Button\">\n    <span class=\"ms-Button-label\">Output Selected Paragraph content controls</span>\n  </button>\n\t<button id=\"output-selection-controls\" class=\"ms-Button\">\n    <span class=\"ms-Button-label\">Output Selection content controls (BUG?! fails on Desktop Word, works on Online Word)</span>\n  </button>\n\t<button id=\"output-selection-control\" class=\"ms-Button\">\n\t    <span class=\"ms-Button-label\">Output Selection content control</span>\n\t  </button>\n</section>"
  language: html
style:
  content: |-
    section.samples {
        margin-top: 20px;
    }

    section.samples .ms-Button, section.setup .ms-Button {
        display: block;
        margin-bottom: 5px;
        margin-left: 20px;
        min-width: 80px;
    }
  language: css
libraries: |-
  https://appsforoffice.microsoft.com/lib/1/hosted/office.js
  @types/office-js

  office-ui-fabric-js@1.4.0/dist/css/fabric.min.css
  office-ui-fabric-js@1.4.0/dist/css/fabric.components.min.css

  core-js@2.4.1/client/core.min.js
  @types/core-js

  jquery@3.1.1
  @types/jquery@3.3.1