Flexible Fasting Option?

What happened to the flexible fasting option that started calculating your fasting window automatically based on the last food that was logged during the eating window?  I had my fasting program set to that and that option appears to have been eliminated.  The new "flexible" appears to want me to manually tell the app when to start and stop the fast.  Can we not have both option in the flexible choices?  My fasting mojo has been lessened because my fasting program I had set up in the app appears to have disappeared through no action on my part.  Please advise.  Also, if I'm missing something please advise as well.