QFileSystemWatcher.fileChanged not emitted just after addPath on windows

The attached program does the following:

• create a file
• watch it with QFileSystemWatcher
• open it with flags out | trunc | binary
• wait for the fileChanged event and exit

The fileChanged event is not emitted sometimes. I run the program in a loop in git bash and after 1 to 10 runs, it deadlocks because the signal is not emitted.

If we add a short sleep before opening the file after starting watching it, the program always succeeds.