Hm--I bought a box at the start of the pandemic to assure that I could bake the occasional Grape Nuts bread (my husband's favorite), but I had no need to buy a box recently.
Might there be a barley sourcing issue? I'm still flabbergasted that Bob's Red Mill dropped barley from its product line, especially since barley can play a part in regulating blood sugar and reducing cholesterol, so it would seem to be a fit with the company's emphasis on health. I started using it because I like the taste, and it works particularly well as a partial substitution for AP flour in cakes. (It is also crucial for my crispbread recipe.) The reply I received from Bob's Red Mill mentioned sourcing and equipment as reasons but without additional details.