Advancement bug

I believe is a bug with Advancements

I made tons of working advancements till few weeks ago, now I'm adding new ones to my mod but they do not work so i believe the new mcreator may be bugged

It's quite easy: advancement "no root". Use procedure for players killin entities for example and use trigger "player completes advancement" for the reward

The problem is that rewards are given many times and also mixed up with those from the second advancements for example

As said, I have made tons of advancements in the past weeks and only now they are not working

Any hint ?