I usually use Morty Cards ASAP even if I don't have 5 quests left because they seem to carry over to the next day. But the effect seems to have just expired. Is this a bug? I notice I re-received high scorw prizes as well.

sorry, never saw this question last month. Morty cards are on a 24 hr timer. So if you activate at 5pm subeta time, it should be good (providing no glitches or other issues) until 4:59 pm the next day.

Thanks for answering such a dumb question; I realized how to click on the buff icons and that there's a countdown page for them a week later, and never remembered to come back to this topic.