Multilingual App Toolkit doesn't generate keys in resource file

After last update of Multilingual App Toolkit (in UWP project) I have a problem with propagate keys from source to destination translations. My piece of project looks like:

In the past, when I had added key to test.resw (in en-US) and then have used Generate Machine Translations, it added also key in test.resw (pl-PL). Now, after translations I can see my translated key in .xlf file, but it is not copied to test.resw file in pl-PL. Consequently, it's still return English translation for key, because cannot find it in pl-PL.

Do you have any idea ?

Just try to Build your project, Multilingual App Toolkit doesn't update resw files right away after you modify the main resource file.