Checking Safety Hook, Front Lid
WARNING: This page is about a different car, the 2020 Porsche Cayenne and 2019 Porsche Cayenne. However, it is still accessible from the selected car via links, so may be relevant.
Check that the front lid is held down by the safety hook (locking hook) on the upper part of the lock after opening the lid lock.
Check that the return spring on the upper part of the lock pulls the safety hook back fully when the front lid is open.