Editing file removes ContentControl CustomXMLPart binding (dataBinding tag removed on save)

[gpanayotov]

This issue is unique.

• [X] I have used the search tool and did not find an issue describing my bug.

Operating System of DocumentServer

Linux (DEB package), Docker

Version information

7.4, 7.5

Expected Behavior

When editing a document with content control bound to a Custom XML Part and saving it the data binding should remain (w:dataBinding tag should remain) and not deleted

Actual Behavior

After i open a document with w:dataBinding in w:std and changing somethin otside this tag then after save the tag is removed from the new document

the part of the document.xml before editing with the editor is:

        <w:sdt>
            <w:sdtPr>
                <w:id w:val="2142771203" />
                <w:placeholder>
                    <w:docPart w:val="DefaultPlaceholder_-1854013440" />
                </w:placeholder>
                <w:dataBinding w:prefixMappings="xmlns:ns0='https://example.com/template' xmlns:ns1='http://www.w3.org/2001/XMLSchema-instance' " w:xpath="/ns0:Template[1]/ns0:Task[1]/ns0:Title[1]" w:storeItemID="{16BB3F27-6769-43F1-94EF-38FF097B8F79}" />
                <w:text />
            </w:sdtPr>
            <w:sdtContent>
                <w:p w:rsidR="00502058" w:rsidRDefault="00502058" w14:paraId="65D134F2" w14:textId="48E5E0A5">
                    <w:r>
                        <w:t xml:space="preserve">A.10 Test title</w:t>
                    </w:r>
                </w:p>
            </w:sdtContent>
        </w:sdt>

After saving the document the part of the xml looks:

        <w:sdt>
            <w:sdtPr>
                <w15:appearance w15:val="boundingBox"/>
                <w:id w:val="2142771203" />
                <w:placeholder>
                    <w:docPart w:val="DefaultPlaceholder_-1854013440" />
                </w:placeholder>
                <w:rPr></w:rPr>
            </w:sdtPr>
            <w:sdtContent>
                <w:p>
                    <w:pPr>
                        <w:pBdr></w:pBdr>
                        <w:spacing />
                        <w:ind />
                        <w:rPr></w:rPr>
                    </w:pPr>
                    <w:r>
                        <w:t xml:space="preserve">A.10 Test title</w:t>
                    </w:r>
                    <w:r></w:r>
                </w:p>
            </w:sdtContent>
        </w:sdt>

Reproduction Steps

1. Create a docx file with content contro; field bound to CustomXMLPart or download the following file: test.docx
2. Open the file
3. Change something outside the content control
4. Save the file
5. Check the databinding tag

Additional information

No response

[XDmitryK]

@gpanayotov Hi Thanks for your feedback, I can confirm this is bug issue #64898