Has assassination changed under 2.12?

[tinkthank]

Maybe it is just my imagination, but I could have sworn that I could assassinate multiple enemy commanders in a province in one turn before 2.12 (by having many assassins in one province, all set to assassinate), but now I cannot. Now it seems that I can have multiple assassins in a province, but ONLY ONE will ever assassinate, no matter how many enemy commanders are present, and in fact: only the "first" one (the highest in the list).

1. Is this my imagination?
2. If not, was this intentional?
3. If intentional, why?

Thanks much!