Auto-Fill not working with Windows desktop app

Hi @Maze, thanks for getting back to me! To clarify a bit here, the desktop app is intended for situations where you'd like to view, edit, and manage your data individually or in bulk, with Quick Access providing a faster way to find, view, and edit items, and fill your credentials into other Windows apps.
In comparison, the browser extension is designed for daily use, saving and filling your login information on websites.

We usually recommend using both alongside each other for the best user experience, as the two can integrate to share their unlock states, and this allows 1Password to stay unlocked for longer, as well as allowing you to unlock both with biometrics when Windows Hello unlock is enabled. In addition, filling-related functions within the desktop app such as the Autofill shortcut and the Open & Fill button require the extension installed in order to successfully fill your details, as they work by telling the extension which credentials to fill.