Workaround: 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); } } } }