How to make a UMG Function working with TriggerBox?

I know it might be similar to my previous thread, but I’m in a kind of hurry.

I made a working subtitle changer in my UMG BP, but when I decided to move it into my Collision BP for the sake of simplicity and editing, it won’t change, even If I binded with the Collision BP Text Function.

Funny enough, it does works with Pawns and possibly Player Controllers

Judging from my tests today, it appears that somehow that the Index variable is not having any reaction if I try to set it to change from another actor/BP, thus nothing is changed from my Text Array.

(Feel free to copy and use it)