Mexican Pinguicula and their hybrids, contrary to popular opinion, do not have a "dormancy", neither do they have a "resting" phase. Some of them do have two leaf forms, called heterophyllous (literal translation: different leaves), these are generally referred to as "summer" and "winter" leaves, where the summer leaves are larger than the usually smaller winter leaves. Often you will hear that the summer leaves are carnivorous and that the winter ones are not. I have found that this is not at all accurate, and though the larger summer leaves are often better equipped for carnivory, and much more efficient, the winter leaves are not usually entirely unable to capture and utilize insect prey. The exception being, those few species that form their winter leaves as a tight bulb-like bud, beneath the soil surface. These are non-carnivorous, but they are still not "dormant", as they continue to grow new leaves, adding them to the center of the rosette, and many also sent out flower-stalks and bloom when in this growth phase.
Though it is difficult to see clearly, it appears that the crown of your plant may be buried too deeply in the media, it may even have had the crown rot out, but that is difficult to see without additional photographs, from other angles, and possibly unburying the crown of the plant from the media. Since a few leaves appear intact, they may yet be capable of sprouting and regenerating into replacements for the original plant.
However, if the plant is simply forming its winter rosette, which is what I suspect. The crown, possibly visible underneath the central leaf, will appear as a tight cluster of small scale-like leaves.