Don't allow naps to continue sleep cycles
It's my second day/night using Pillow. This morning I tried to add a nap (just for fun) and I continued my overnight session. When I cancelled the nap it messed up my overnight session somehow, making the quality higher (I think it turned it into a nap internally). It seems like one wouldn't want to "continue" between different types of sleep, as they aren't really compatible.
Same thing kinda happened to me. Today was my second day of use. I woke up and turned off the alarm and used the nap to wake me up, I did that two times and my mood was not recorded, and data not recorded on the day or week charts. The data was included in my night cycle though.