Cortana has been finished for a year now, this is the same Cortana that sits on your Windows 10 PC. I doubt the problems will go away. There should be an option to change the key command, there should be an option to actually teach her what you want to do. Like say something, then manually go where you want to be taken. And then she understands it next time. The way it works now is just an inferior version of the previous Kinect commands. Where it took two seconds to launch any game it now takes ten. If she can connect to the server, which seems to be the case every second command. And in non English versions she is infinitely worse. Good luck trying to get her to launch a game with an English title with German settings. She's trying to turn that title into any German expression. I can't even say "Hey Cortana, unsnap" in German, she just bings some shit.
Read the changelog and the known issues (this is only regarding Cortana as of yesterday):
Cortana
If Cortana doesnt hear you the first time, you can usually try saying the phrase again.
In some cases Cortana wont recognize the name of any game or app (ie. "Hey Cortana open Netflix"). This is an issue were working to address, so please use Report a problem if you encounter it. You can resolve this by launching Cortana from My games & apps, returning to the dashboard. On Cortana in Snap. On Cortana in Snap Tile in home, press the menu button to open the menu and select "Quit", which will reload Cortana, on next use.
If Cortana says she didnt hear you right after you say Hey Cortana, navigate to Settings > Account > Privacy > App > Speech > Collect Info (accept) and confirm the setting is checked.
When Cortana is Thinking
sometimes the sounds continue longer than intended. You can open Cortana from Guide or My Games & Apps and then close it again by hitting B button.
On the first use of "Hey Cortana" after a reboot or crash, Cortana snaps but may display no results.
You may be unable to use See-It-Say-It in various apps such as Netflix, YouTube, and the Blu-Ray Player app.
Cortana sometimes needs to spend more time "Warming up..." than she should.
Sometimes short commands are recognized incorrectly (ie. "Hey Cortana mute", "Hey Cortana pause") and initiate a web search instead.
Sometimes short commands take longer than they should to be recognized (ie. "Hey Cortana mute", "Hey Cortana pause").
"Hey Cortana snap TV" sometimes launches Movies & TV, rather than TV, until you say "1" or "2".
"Hey Cortana turn off the Xbox" ... "Yes" in UK, FR, IT, DE, and ES sometimes gets stuck on the confirmation and fails.