I have never incountered this issue to this degree in ten years. This new bakery I decorate for is a little different.
Buttercream:1/4 shortenening, 3/4 butter, water
Icings are always kept in the refrigerator and usually mixed an hour prior to use
Cake is frozen night before, iced and decorated thursday for friday, friday for saturday and sunday.
At other places I usually base ice and decorate the next day.
Promptly after decorating it is boxed and...