Anyone else miss Cortana voice commands, it was so easy to use with just my headset and no...

Yes, I've done this. That is how I found out that using Cortana makes your game go into it's pause menu. Using the Xbox voice command doesn't pause your game, but you can not use the Xbox voice command over the headset. Perhaps if they could just make
it so the Cortana command did not pause the game? That, I think, would solve the problem.

Voice commands will only work if you have a kinect or a headset. Cortana has to be turned on first before you use her voice commands, and if you do not have a kinect, then the Xbox voice commands will not be turned on.

Sounds like Cortana is hearing voice commands through the headset which a new feature that was added with the update. Try turning down the volume a little on the headset so Cortana won't respond to what's coming out of the headset.

Update: I figured out that I am able to use my headset to give commands to Cortana. So what is preventing me from using my mic in a party chat or to send voice messages?

This fixes the mic symbol.

First make sure your Headset is updated to the most recent firmware using the astro command center.

Next make sure your Headset is assigned to your profile under Kinect & Devices / Devices & Accessories. - This fixes Cortana commands and voice to text.

Next disable Cortana then re enable Cortana it will make you restart your Xbox both times.

That should work.

I have an A50 and just figured it out this evening, cortana is working great and voice to text is great too.