I'm trying to recently understand the Copenhagen interpretation. We all know due to Noether's theorem energy is translational invariance in time.
However, in quantum mechanics the experimentalist can have the same initial configuration ("physical system" + "Apparatus") and do a measurement and get different outcomes. Hence, while energy (as a number) is conserved Nother's theorem obviously does not apply (during the measurement).
Now, the Copenhagenist seems to say the measuring instrument is some kind of semi-classical apparatus and the system is purely quantum - the measurement is an artefact of this.
How does the Copenhagenist justify this apparent discrepancy (violation of translational invariance in time)?