Did your favourite coffee quietly swap to a cheaper bean?

The price of coffee beans has surged to record highs, and some major brands have quietly changed what's inside their products without making it obvious on the packaging.
Australian food labelling rules don't require companies to identify the type of bean unless they make a specific claim about it, which means a recipe can change without much fanfare.
So are coffee drinkers getting enough information to know what they're actually buying?