Does an involuntary discharge of a drop of semen while fasting, due to viewing nude images online without stimulating the penis, invalidate the fast?

A Muslim must be wary of following the footsteps of Satan and the self that incites evil, and guard their hearing, sight, and other faculties from what Allah has forbidden, especially during fasting. Looking at 'awrat (private parts) is forbidden by the unanimous agreement of scholars. If one ejaculates due to repeated looking, their fast is invalidated according to the soundest of the two opinions of scholars, and they are required to make up that day and repent. However, no expiation (kaffarah (definition)) is due upon them.