I've been having some debate with another barista at my store with this. If someone ordered a BSOSE with light ice, I would just customize as only light ice and fill the cup to the top. I figured that is what everyone else would do too bc it seems pretty normal for other light ice drinks. HOWEVER, there is a barista I work with who used to be a shift a year ago, who tries correcting everyone on this. She says that we need to charge them for the extra milk since there will be room in the cup. I genuinely believe that if the standard is to fill every other iced drink with no ice/light ice to the top with milk at no additional charge (i.e. black iced tea no ice/light ice, iced chai no ice/light ice) then the shaken espresso would be no different. But this barista is willing to die on the hill that we have to charge them for the extra milk, as in will tell you to charge them for it at reg.
My store is pretty high volume and honestly forget to ask any shifts/my SM when they're in what we're supposed to actually do, so I thought I'd come here and ask you all.