Summary: Changing the time period for the row evolution graph not works, when I'm comparing two periods for a single page. It leads to an exception.
Steps to reproduce:
Comparing periods only works in the graph, if the selected period in the date picker above is the same like for the graph,
Confirmed this is a bug. Changing the period will only change the current period type, not the period type of the period we are comparing to.
Additionally, changing the period back in the graph, will incorrectly set the date using the end date of the period. So if we have a day, 2021-05-04 compared with 2021-05-03, then change the period to week, 2021-05-04 will change to 2021-05-03,2021-05-09. If we change it back to a day, it becomes 2021-05-09, instead of 2021-05-04.