TextField does not update in Game

Hi, i have some strange problems with some textfield. I have a canvas with inside some TextField, my idea is to update the text fields based on which enemy i shoot , the problem is that when i shoot an enemy the text fields don't update , but if i close the "game mode", inside the text fields i find the info about the last enemy i shoot...

i don't know how to resolve this problem, to update my text fields i use : textfield.text = "new text";

Thanks for your help