It's an interesting point for sure. Is it possible to have insulated containers? I assume when food goods are shipped across the world they are kept cool and not exposed to 150*+ heat.
If it was a problem you'd have a container of, say 500 boards, that would all be having issues and I think with those kind of quantities, the issue would be very apparent.
Maybe someone from FW will chime in and give us the inside info.