When you watch a movie on apple TV the TV app allows you to jump back in wherever you left off.
If you want to watch something another family member purchased and dare to go through the movies app > purchased section and then have to leave the movie halfway, that will not show up in your up next section
If you want to watch something another family member purchased and dare to go through the movies app > purchased section and then have to leave the movie halfway, that will not show up in your up next section