I wonder if the pandemic caused a shortage of the Vermont cheese so they had to supplement it with cheese from other areas. Most businesses would rather make small, usually unnoticeable, changes to meet demand rather than have shortages. For example, high demand for bourbon has caused some bourbon makers to make subtle changes, the black label variety of Jim Beam was originally labeled 8 years old but now just says Extra Aged, meaning that the blend has some product in there that is less than 8 years old. That allows them to put more product on the shelves.