I am having this same issue. I am on a Dell Inspiron 15 7000 Gaming laptop. In my case, the volume down key is also my F2 key. The same issue occurs with my volume up key, which is my F2 key, but it switches me to tactical view. In each case, the volume is adjusted, but it is also triggering the sneak or the tactical view. I checked my key bindings, but the primaries are C & B, and the secondaries are empty. Any ideas?
Thanks.