After installing system updates on 02/17/16 for Windows 10, the Surface Detach icon in the taskbar is grayed out and when I mouse over it, it says "Surface Detach: Detached" when it's actually attached and connected to the keyboard. Keyboard works fine but when I try to detach, I have to hold the keyboard detach button for over 10 seconds before the light turns green and I hear the detach sound.
Also, since this started happening, after detaching, the screen no longer rotates in Tablet Mode. Tried locking and unlocking Autorotation and nothing will rotate the screen anymore.
Not sure if these two problems are related.