Easily reproducable.
Happens when payer is still logged in when daily timer resets and the player performs the Guild Check-in since it also resets.
For some reason, Daily Task List does not reset gracefully and player cannot activate the Guild Check-in reward.
After resetting the game, Daily Task List updates but player can no longer get the Guild Check-in reward since player is already Checked-in.
Other events such as chests and check-ins work correctly.
Please fix.