I change them directly by typing in to the start date field something like 2020/08/01 or using the GUI slider and the changes never save between page refreshes. They always reset to the beginning of the year and sometimes odd dates like 2020/01/22.
I've deleted the epics and started over and I still get the same issue. These epics have no child tasks.
Here are two epics with start dates clearly set to 2020/08/01 and 2020/09/01

and when I refresh the screen they reset to the beginning of the year (or when I click between epics you can see the start date has already changed even though the GUI hasn't refreshed yet)
