I’ve noticed some automatic scenes can email and some not. In those that cannot the slider needs bed across but save doesn’t work. I think it is scenes with a time trigger but am not sure yet.
In any case to replicate this specific case create a scene triggered by (<17°C) temperature of a Zigbee device at 18:05 O’clock and activating a Basic R2. Now move to the web and try to edit the scene; slide the notification button and try to save it. You will be able to slide the button but not save it.