Ion Hazzikostas has revealed in an interview with EU Content Creators that keystones will deplete by 10 levels at the start of Dragonflight Season 2. This means that you will lose 10 levels of your maximum key you done in the last week of Dragonflight Season 1.
In an interview with EU Content Creators, Ion Hazzikostas has stated that Mythic Keystones will be depleted by 10 levels in at the beginning of Season 2 of Dragonflight.