This works fine at our test setup, refer:
1)
http://prntscr.com/c6wk8k
2)
http://prntscr.com/c6wkrh
The issue on your setup is that you do not have any global languages folder.
So please follow these steps:
1) Please create a folder "languages" in the wp-content folder.
2) Now go to wp-content/languages folder and now create two new folder "plugins" and "themes"
3) Now sync the translations and then try to translate the plugins and theme.
This is because the wordpress first checks the translations from the global languages folder, if the global languages folder is not present or the files are missing then the wordpress takes the default translation set by the theme or plugin.