App window opens and then closes when bundled in an .exe

[LUS24]

Hi I'm using windows 10, python 3.6.4, I'm trying to bunddle the example app into an .exe.

When I run it with this command it works just fine, it stays open but it shows the console (I dont want the console to be seen):

pyinstaller -F --add-data "templates;templates" --add-data "static;static" app.py

But if I run it with this command it shows a window and then closes.

pyinstaller -w -F --add-data "templates;templates" --add-data "static;static" app.py

It seems that when the console is closed the Flask server process is closed too.
Any idea of how could this be solved?

Thanks in advance

[BlackTurtle123]

I got the same issue