Hidden quest for watching CM 180 times has changed to an impossible setting based on calculations

Recently, I've been watching CMs 180 times. There's a limit of 10 per day. Today is the 17th day. In my previous post, the hidden quest that I managed to complete by logging in immediately instead of waiting for the date change, now shows only 3 hours remaining. Therefore, this hidden quest is impossible. Because on the 18th day, this hidden quest disappears. I suspect it's a setting error from the developers, so I've sent a question, but they're probably on break~ However, those who have reached this hidden quest might want to log in and watch CMs. It's a hidden quest for 10,000 gems, It's a hidden quest with a much higher reward than clearing a stage. Since the setting is impossible, the developers might bring it back after their break (though I can't guarantee it).