Hi Again!
I have run the Surface diagnostic tool, without any success. The problem is still there. I have see the following. When the keyboard not connects, (The mouse and the other bluetooth devices connects at once after sleep mode). If i wait 30 - 40 seconds it connects by it self.
Yesterday i got a new Surface Book 2 15", i have installet this one up, installed all the windows releases and hotfixes and so on.... Connected only the Microsoft keyboard and the Microsoft mouse.. Yesterday i experienced no problems.. But today i have the same issue with this new Surface Book 2 and my keyboard. I have tried the same, waited about 30 seconds, while clicking the windows button, until i see it starts the Windows start menu. So with this new setup i have the same issue, as with my other surface book 2 13" laptop.