I’m betting the tainted ingredients are from China and purchased by unregulated pharmaceutical entities. This will be buried as soon as conveniently possible.
I think they’re suspecting that the contamination came from the recycling dump next door - the same people run both businesses.
There are only two potential sources for the fungus contamination:
(1) The contamination was in the ingredients.
(2) The contamination came from inadequate sterility of their equipment or containers.
I'm guessing that your suspicion about China is correct, that they were cutting corners and using Chinese product, and that this will get buried.