macbook pro tries to connect bluetooth keyboard when waking up from sleep

I have a 2012 Macbook pro and it is trying to connect to a bluetooth keyboard when I wake it up from sleep. The computer freezes while it is searching for the keyboard and only works properly once it discovers there is no keyboard connected. I have never used a bluetooth keyboard and I currently have my bluetooth switched off.

Doe anyone have any idea how I might stop this from happening? It can often freeze for quite a while, which can be very frustrating.