Differentiation Using Template Key

[ktate749]

I tried an example of differentiation I saw on YouTube, i.e. (COS(e^x)) in CAS mode. Using the template key d()/d() and setting x= to some value in the denominator I get a correct symbolic answer, e.g. for x=2 -e^2*sin(e^2). But if I leave the equal off the x the calculator assumes x=0 and returns -sin(1) as an answer. In the video the calculator returned -e^x*sin(e^x) a general symbolic answer.
If I explicitly enter diff(cos(e^x)) I get the expected general symbolic answer -e^x*sin(e^x).
What gives?