What are the chances of double corrupt and item? Bug?

Considering this article [Removed by Support] double corrupt chances are 25% per try.

I have tried 19 times to double corrupt ephemeral edge dusk blade

1) disappeared
2) poof to rare
3) all white sockets
4) disappeared
5)
6)
7)
8)
9) dissappeared
10)
11)
12)
13) disappeared
14)
15)
16) dissappeared
17-18-19)

CAN GGG EXPLAIN IT TO ME? CHANCES 0 PERCENT?

CONSIDERING CHANCCES ARE 25% IT IS ACTUALLY CHANCE TO GET ATLEAST ONE DOUBLE CORRUPT ARE

1-3^19/4^19 = 0.99577171741

THAT MEANS I SHOULD GET ATLEAST ONE DOUBLE CORRUPTED ITEM WITH 99.57% chances! EXPLAIN IT TO ME, WHY THE **** YOUR RANDOM IS ****?

Working as intended. I suggest you read up on how probability works. Being unlucky is not a bug.

It would work as intended if chances were 1% but 25%.

I cannot play the game if cannot predict anything mathematically, any my calculations do not work cuz random is bugged

If i corrupt an item i expect 1/4 items to be double corrupted, not 0/19

Thats how randomness works though. If it was exactly 1/4 you could just throw worthless items in until you don‘t hit the corrupt 3 times in a row and then double corrupt a good item the fourth time. It sucks that you got this unlucky but 0.5% basically means for every 200 people 1 will get as unlucky as you.

You say you want to calculate things mathematically yet you dont understand the law of large numbers when it comes to probability.

Short term you have chances to see variance like you did right now but as you approach bigger and bigger numbers all the way to infinity it gets closer and closer to seeing exactly a 25% chance.

My life is limited and game cannot provide large numbers obviously

For example in music player even if u have limited playlist and you choose to play random track it works as would never play the same track twice, secondly you are advocating against youself and more you advocating the more you will meet the same situation as me, thirdly, this situation means that random function that GGG use has very bad distribution on small numbers, obviously unacceptable for this gaming situtation.

Please more advocates that GGG would never change anything and still use the worst random distribution ever on the planet.

Nah I just have some understanding of probability math so I dont get mad and make forum posts when I get unlucky.