Greetings from Com2uS!
Please see below for more info on the issues that are occurring after the v1.5.4 major update.
> Error Details
1. An error where the discount mark not being displayed for the daily first purchase of Mysterious Egg after midnight
> To resolve this issue, please try to purchase the Mysterious Egg, tap the Cancel Button and return to the Shop or re-enter the game to see the discount mark display properly.
2. An error where the user who possesses more than 150 Crystals but less than 300 Crystals can't purchase the Mysterious Egg in discounted price (150 Crystals)
> Please note that you have to possess 300 Crystals or more to make a purchase for the Mysterious Egg that is being sold at 150 Crystals. This issue will be resolved via next update.
We sincerely apologize for the inconveniences caused by this issue and thank you for your understanding!