Similar to https://feedback.telerik.com/reporting/1356710-rendering-to-xlsx-should-not-add-bom-to-xml-files :

DOCX files exported with DocxFormatProvider contain a BOM in every exported XML file. Some programs fail to load those DOCX files.

Please remove the BOM, or add a toggle in DocxExportSettings.

Updating a Table of Contents field with a custom TOC Style does not respect it.

As a workaround modify the style after the TOC fields are updated.

With the current implementation of the RadFlowDocumentEditor`s CharacterFormatting.FontWeight.LocalValue accepts only FontWeights.Bold and FontWeights.Normal and throws an exception when setting different weights (ex. Black, Thin, etc.).

When mailmerging a document, with nested mail merge group which starts inside a table and ends outside the table, a NullReferenceException is thrown: "System.NullReferenceException: 'Object reference not set to an instance of an object.' firstParagraphInTemplate was null."

Workaround: move the group end (EndGroup, TableEnd, RangeEnd, or GroupEnd) merge field inside the table where the group starts.

List's top and bottom margins are not correctly exported.

Workaround: Apply TelerikNormal style to the 'ol' element.

Indent of BodyTextIndent style applied to a paragraph is not respected on export.

Workaround: Remove the applied style.

var p = run.Paragraph;
p.Properties.StyleId = string.Empty;

Importing a document containing a hyperlink (<a>) tag without content extends it over the trailing elements.

For example, importing this HTML:

<a></a>
<p>First paragraph</p>
<p>Second paragraph</p>
<p>Third paragraph</p>

Generates:

Instead of this: