If you have one creature from Putricide’s Creation, and another normal version, you can still “find the third”, but they won’t form a triple because they are treated as ttwo different creatures.
The hero power does not promise to make a triple.
It found a third, just as it says.
What actual bug do you think exists here?
A putricide’s creation is not the same thing as an actual minion.
Both are not the same minion.
“Finding a third” should not apply to two different minions in that context since there’s not even a second that has been found.
Otherwise that mean that you can have 3 times the “same” plain minion in hand, yet it won’t triple, which doesn’t make sens to have 3 plain copies to not be a triple