Some keyboard keys not working on password input to Yosemite login screen

As stated in the title some keys don't work when trying to input my password into the Yosemite login screen. The weird thing is that if my mouse isn't plugged in (Razer Naga) when I turn on my Macbook Pro the issue doesn't occur and if I restart my Macbook Pro, even with the mouse plugged in, then everything works as expected.

I never had this problem in any previous versions of OS X.