Currently empty paragraphs are exported to HTML with one space inside. Such paragraphs are not rendered by the browser. Such paragraph should be exported to HTML with one non-breaking space (@nbsp;) inside to ensure that they are visible in the browser.

Workaround: manually add nbsp-s in all empty paragraphs:
paragraph.Inlines.AddRun("\u00a0");


Steps to reproduce:
- Create document with empty paragraphs:

                        var document = new RadFlowDocument();
                        Section section = document.Sections.AddSection();
                        section.Blocks.AddParagraph();
                        section.Blocks.AddParagraph();
                        section.Blocks.AddParagraph();
                        section.Blocks.AddParagraph().Inlines.AddRun("test");

- Export it to HTML.

- Load the HTML in a browser.

Expected: The word 'test' is preceded by 3 empty rows.

Actual: The word 'test' is on the first row.

When a paragraph is placed inside a list item (<li> tag), the paragraph properties are not applied to it on import.

Add support for shapes with textual content. These are described in OpenXML specification - txbx (Textual contents of shape). 

Such shape can be added to a Word document using the Insert -> Text -> Text Box

The item is closed as duplicate. Please, follow the feature request for shapes at https://feedback.telerik.com/Project/184/Feedback/Details/190116

Updating TOC field or any other CustomCodeField that has a result fragment spread on more than one paragraph will cause an ArgumentException.

Page breaks can be exported and subsequently imported using the "page-break-before: always; " property set of some elements.

This setting should allow setting the content between the list level bullet and the paragraph text to some of the following options: "tab", "space", "nothing".

When a paragraph doesn't have applied a style, the Normal style should be automatically applied. Currently, similar paragraph obtains its style from the parent.

This is reproducible when exporting to PDF and RTF.

Workaround: Check if there is a paragraph without style ID and if so, set it to Normal:

foreach (var paragraph in this.document.EnumerateChildrenOfType<Paragraph>())
{
    var value = paragraph.StyleId;
    if (string.IsNullOrEmpty(value))
    {
        paragraph.StyleId = "Normal";
    }
}

Available in LIB Version 2017.2.731.

The control word (\~) is imported but the symbol is not parsed, therefore not included in the content.

Fix available in LIB Version 2017.2.814.

When importing paragraphs with negative text-indent from HTML, e.g. 
<p style="text-indent:-12px;">
test
</p>

they should be imported with HangingIndent + the same value with negative sign for LeftIndent, e.g. HandingIndent: 12 AND LeftIndent: -12.

Also, margin-left should be combined with the text-indent, e.g.
<p style="margin-left: 16px;text-indent: -16px;">
test
</p>
should be imported as HandingIndent: 16 AND LeftIndent: 0.

The table height is currently not respected when applied to a table element through an attribute or through a CSS style. This setting is not respected in the flow document model, but we could import it and calculate the value to distribute it to the rows.

Currently, this property is exported only for Run and Paragraph elements.

The issue is reproducible only in a specific setup with a specific document. It is related to the calculations of the line spacing when the table row should be split between two pages.

Workaround: Change the line spacing:
foreach (var paragraph in this.document.EnumerateChildrenOfType<Paragraph>())
{
    paragraph.Properties.LineSpacingType.LocalValue = HeightType.Auto;
    paragraph.Properties.LineSpacing.LocalValue = 1;
}

When a table cell has a smaller width set and inside there is a paragraph with larger indent set or bullets, the table does not expand in order to show the text and the text becomes invisible.

Applying border="1" to a table element, should set table cells borders to the same value. Currently, only the table borders are set.

When text content (text in paragraph, text in span) in HTML contains line break (\r, \n, or \r\n), it should be imported as space. Instead, the new lines are currently removed. 

For example, <p>first\nsecond</p> (line feed between the words) is imported as run with content "firstsecond" instead of "first second".

When exporting a nested table, which is inside a table with cells whose sum of widths is more than 100%, the last cells are missing from the exported with PdfFormatProvider document.

The issue is not observable in the other format providers.

When the document contains an image with extension, which is not among the supported ones, a KeyNotFoundException is thrown during Import.

When a document containing a field without a separator is inserted using the RadFlowDocumentEditor.InsertDocument(*) method, NullRferenceException is thrown.

Workaround: Fix the document before inserting: 

private static void WorkaroundFieldsIssue(RadFlowDocument flowdocument)
{
    foreach (FieldCharacter fieldCharacter in flowdocument.EnumerateChildrenOfType<FieldCharacter>().ToList())
    {
        // only for start
        if (fieldCharacter.FieldCharacterType == FieldCharacterType.Start)
        {
            if (fieldCharacter.FieldInfo.Separator != null && fieldCharacter.FieldInfo.Separator.Parent == null)
            {
                Paragraph parent = fieldCharacter.FieldInfo.End.Paragraph;
                int index = parent.Inlines.IndexOf(fieldCharacter.FieldInfo.End);

                fieldCharacter.FieldInfo.End.Paragraph.Inlines.Insert(index, fieldCharacter.FieldInfo.Separator);
            }
        }
    }
}

When the value in the document variable collection and the argument of the DOCVARIABLE fields are with different casing, the field is not updated.

Available in LIB Version 2018.3.1029.