Yes you are right. On the first day the system gives players a chance to get two chests. Though i don’t know the exact thing but mostly you have to collect the first chest with in 12 hours** of the starting of the event to get a chance to get 2nd chest. If you collect the first chest after that you won’t get the second chest.
**not confirmed by flare. But it’s Somewhere close to 12 hrs. Speaking from experience.
I was not given the possibility to get a second chest too. Pretty disappointing. Probably the last huge compensation was balanced in this way.
Regarding the 12 hours, it was not confirmed anywhere and by experience this is not true. Usually, you have two chests in a row, you don’t have to wait 12 hours to get the second one and/or you have to do the first one within 12 hours. More than once I got mines just few hours before the second day of the event.
It has nothing to do with waiting 12 hours between 2 festival chests on first day.
As soon as the event starts, you have almost 12 hours to get 15 crowns and collect the first festival chest. If you accomplish that in time, you get the opportunity to collect another 15 crowns for a second chest. It’s a bug they never fixed.
So make sure you collect the first chest on first day, before time expires, then you get the opportunity to get a second chest on the first day.