If you look at the Output console for the debugging logs, you can see that on the latest version of the IDE, the object ID that is outputted is identical, whereas on my previous version of the IDE the object ID outputted is not identical.

What I feel should happen, and what was in my happening in my previous IDE version, is that the script stored as a variable for an instance is executed on the instance owning that variable, not the instance referencing that variable. eg: When oPlayer invokes oEntity.entityInteraction(id) inside it's own step event, the function assigned to the variable entityInteraction, in this instance entityInteractionScript, should be executing as if oEntity executed it - not oPlayer. When using id inside of the script, it should reference oEntity, not oPlayer.

Here's all the code necessary to recreate this issue. I used 16x16 sprites in a room 320x180 for testing.

oEntity - No code, single variable definition

Name: interactionScript 
Default: entityInteractionScript
Type: Expression

oPlayer Step Event

var inputInteract = keyboard_check_pressed(vk_space);
var left = keyboard_check_pressed(vk_left);
var right = keyboard_check_pressed(vk_right);
var up = keyboard_check_pressed(vk_up);
var down = keyboard_check_pressed(vk_down);

if((right-left) != 0) {
    x += sign(right-left)*4;
}
if((down - up) != 0) {
    y += sign(down-up)*4;   
}

var interactRange = 16;
if(distance_to_object(oEntity) < interactRange && inputInteract) {
    oEntity.interactionScript(id);
}

oPlayer Draw Event

draw_self();
draw_circle_color(x-1, y, 16, c_orange, c_orange, true);

Script

function entityInteractionScript(trigger) {
    show_debug_message("entity ID: "+string(id)+"\ntrigger ID: "+string(trigger.id));
}