OK....Here is what I know about this.
We had Halloween Treat Tickets that worked (and sometimes still do) for FP.
In November, we used them both days, got FP.
In January, my mom used them three days, got FP.
In February, my mom used them, did NOT work, no FP.
In April, during Spring Break, we found the first MORNING, they worked, got FP until around 11am, after that, no such luck.
There must be some "switch" that someone has to flip or whatever, perhaps even daily to get it NOT to work.