I attached the Type cover to my Surface Pro and use it as the standard or default. It works fine with any text field nad web address. If I put the talbet into asleep and disconnect the keyboard, Surface still “thinks” the type keyboard is attached and doesn’t check on the status of the connection. That make me can not log in because the on-screen touch keyboard won’t appear automatically. Then I have to press Power button to a hard boot and re-attach the keyboard.
The Surface Pro and RT have the bug. The onscreen keyboard does not display, if you remove the type cover before wakes it up. Other issue is that the soft keyboard does not automatically appear in desktop mode.
You could try the workaround before microsoft release a related driver update. While the cover is attached, wait for the screen to switch on and then remove the cover.