Description:
Version 7.0.5.2 (x64)
The file created by Explorer seems to be saved as docx by LO Writer but contains only the text which was outside of the text field - without any warning you have a severe data loss. The text field disappeared.


Steps to Reproduce:
In Windows Explorer select New > Word-Document (*.docx) 
LO Writer opens the file.
Add some lines.
Add a text field with some lines.
Save the file 
close LO Writer and open it again
Open the saved file
See that text field and its content disappeared.

Actual Results:
   The text field and its content disappeared

Expected Results:
 Complete document is shown



Reproducible: Always


User Profile Reset: No



Additional Info:
Findings:
The file created by Explorer is an empty file. After editing LO Writer SEEMS to save a docx file but saves a text format file only - and cuts off the content in text field. Without any warning you have severe data loss. 
In my case I applied intensive formatting in the text field, printed it out and the result was fine. When I opened the document again next day, the main content was gone. Data loss is always a severe bug.
If you use in Windows Explorer >  New > Open-Document Text you get an 8 kB file which behaves correctly as odt file.