I saw a comment trying to say it's working as intended. If that's the case, and it's working exactly as intended, then they shouldn't have worded it the way they did. Because of the way it's worded, if you read it exactly as written, then it makes it seem as though it's how the reporter of the bug thinks it works. My judge at pre-release said that it works exactly how the reporter of the bug says it works. So, it's worded really poorly. Put the quotes after the stat change, make it say it has these base stats and then say it gains "xyz effect". Removes the confusion. Or add a comma after the quoted effect so that way it is for sure a separate effect from what is previously stated. It's ridiculous that the poor wording on the card is causing such confusion.

In the card I read "when this creature dies, return it to the battlefield tapped under it's owner's control", it's nstrange that before the creature die, it's take new stat, dies and nothing happend, i lose many selaed event this way.

You're misreading the effect. The p/t setting is not part of the granted ability, it is just another effect of the spell and happens right after the ability is granted. The creature is not supposed to come back with those new stats, it is supposed to get the new stats and when it dies come back with its original stats. Which is what apparently happened, so all is as it should be.

Basically, it functions much like all the other black combat tricks, that bring a creature back. It gets some boost, then comes back as it was.