So been doing a little testing and I found something curious. Windows version.
I created an account on Sunday, played to 50 and after a little while the summer season showed up as normal. After the Monday reset the Fall season worked as intended with all the events and updated candies.
I made another account on Monday and played to 50. The next day the fall season event did not trigger nor did the candy change.
It seems the season is tied, at least to a degree, to the Monday reset vs the daily one.
While this only would affect new players it does seem odd.