No, this is not normal behavior, but if you search around this board and the internet you will find many entries of complaints about SP3 not recognizing the keyboard, including from myself. Microsoft CSR made me do a refresh, and although this has improved things, I’m still experiencing the keyboard not working almost once a day. It would be nice if it made me detach/attach the keyboard only once to make it work again, but it’s very temperamental and sometimes takes minutes of trying. It’s makes for a stressful user experience, not to mention embarrassing making all this click clack sound while fiddling with your device with people around you working.