In classical mechanics there is Noether's theorem: If a system has a certain symmetry there is a related conserved quantity. Energy conservation is a result of a system being time invariant. This is what I have learned in my classical physics and also quantum mechanics courses.
In Electroweak theory there is $CP$ violation which also means that time reversal $T$ is violated as $CPT = I$. Does this mean that energy conservation is violated in electroweak theory? If this would be true and since electroweak theory holds above the Planck (length) scale is it possible to create energy in a closed system?