Thank you for checking.
I tried latest version (version 1.7.2) and Unity Version is 2020.3.25f1. Os is Mac.
But I failed.
Although I inputed 55 in Test Array of Element 1, it was changed Test Array of Element 0.
What's your Unity Version and Behavior Designer Version.
I tried windows, but...
First, I made script like this.
Next, I set value in element 0.
Next, I set 5 in Test Array of Element 1. ( Sorry, I cannot attach image file because of limit. )
But, it change 5 in Test Array of Element 0. Element 1 is not changed.
I want to set another array size in element 0 and...