Enabling/Disabling Canvas destroy my instantiated objects

Hi, i have a script that instance objects with a Coroutine, and in other object i have a script that enable/disable a canvas, the problem is that when i enable/disable the canvas the objects instantiated (clones) die.

What im doing wrong?

PD: what I want to do is to have a script that is continually creating objects, creating one and destroying it in like 5 seconds, and then create other object and so.

 

Feel free to attach the scripts so that we can look them over. (Don't forget the code and spoiler tags.)
We won't write your scripts from scratch.