Inconsistent autolock behavior

1. install Nuxeo server
2. install Nuxeo Drive 2.4.3 on Windows 10
3. Server-side: enable synchronization
4. Client-side: wait for synchronization
5. Client-side: create a word document using word and save it
6. Client-side: wait for synchronization
7. Open the same file in Word
8. observer the autolock message or not (sometimes it pops up sometimes not)

Doing several attempts will trigger the issue. One can simply stop and restart Nuxeo Drive to see the issue happening.

Same behavior with Libreoffice on Windows 10.
Testing with Libreoffice on OSX works fine.
Could not test with MS Office on OSX.

So far, it looks specific to Windows 10.