A minor bug.
If you watch at 123solar after midnight and before 123solar awake, you see the main graph with yesterday date and the graph of the previous day with the same date, as shown in the following captured image.
In this example the after midnight is 15.12.2016. The main graph was plotted during the day before (so 14.12.2016), and the graph below should be of the previous day (so 13.12.2016).
It should show the correct dates or the titles "yesterday/before yesterday " or titles/dates mixed.
Of course when 123solar awaks, it move the main graph to the bottom position, create a new main graph and the dates are correct.