this issue may be related to the issue: https://forum.softmaker.com/viewtopic.php?f=389&t=22294.
- I have created the document "Original.docx" which includes a simple equation with OnlyOffice (ONLYOFFICE Desktop Editors version 6.4.2.6). I have verified its contents without saving also with LibreOffice 7.2. The equation was correctly interpreted and could be edited.
- I have opened the document "Original.docx" with TextMaker2021 (TextMaker Professional 2021 (rev S1038.1028) 64bit ) to find that the equation was still correctly displayed, but was converted into some "object". I have added a screenshot of this result and saved the document under "SavedByTextMaker2021.docx".
- I have re-opened the file "SavedByTextMaker2021.docx" with OpenOffice (and LibreOffice 7.2) to find that the original equation was gone. I added a corresponding note and saved the result in the file "ReOpenedAndSavedByOnlyOffice.docx".
Regards
Tom