So, I don't know if I should be bumping threads, but those ants from an old thread (Something Annoying) have come back. I changed the brand that we use usually for tissues, its lil bit more expensive but it looks like they came from inside the box. Possibly an ant problem when the boxes were made?
Move the box and see if ants continue to exist. I highly doubt ants would have come inside the box as 1) this is a reoccurring issue and 2) ants can escape the box prior and so there would not be many left