Left EQ button behaving strangely

When I power up my pc the left hand EQ button light on my CC121 comes on and stays on. Nothing happens if you press it - it stays on. When I open Cubase, the light goes off. If I open a project all is normal.

If I open Wavelab, the button comes on again, but if I then close Wavelab it stays on.

Anyone know what is happening?

(I have the latest update 1.7.4 installed)