We are aware of a UI issue where consuming all of your Revenge of Legends Crystals causes the countdown timer for the next free Crystal to disappear from the Crystal tab.
If your timer has disappeared, don't worry—your progress is still tracking normally. You can easily check when your next Crystal will be available by following these steps:
Return to the Main Landing Page.
Look for the Daily Super Event section.
Check the timer listed directly under that section to see when your next Crystal is ready to claim.