If text box is NOT one of the Windows standard text controls, this feature doesn’t work. Since Chrome and a few other apps don’t use standard text controls, they don’t work as expected. I know Internet Explorer 11 and some other apps will work. If it doesn’t work on IE 11, can you make sure you set a keyboard shortcut (in your case Ctrl+Alt+Z) in the Shortcut Key to Grab Text with EmEditor text box of the Customize Tray Icon dialog box? It might not work on all sites. Please try a different site, for instance, this forum text box. The keyboard focus must be set within the text box when you press the shortcut key.
Thanks,