This isn’t unusual, as they have to fulfill orders that are smaller than a full case. I would recommend opening it up and taking a look. There’s no harm in doing so.
I’ve ordered from them and have some arrive with the tape torn, and some not. I think it’s luck of the draw on if they either pre-opened for individual orders, it was selected for random QC, etc.
Agree might as well open to double check now that it’s already torn