AP cost will not go to zero. It will show 150, but when you click on it, if you have a free one, this window pops up.
There may be a delay. I've clocked 13 minutes as the maximum so far I've had to wait. Sometimes it happens within 30 seconds. It depends on what is in the calendar bundle. The one with 40 arties took the longest. The mothers day bundle was within a minute.
Edited 5/8/2023 14:35:15