Again, I need to make it clear- The supposed original reaction was never Spawn's original reaction. It only played for AA, and it still does. Spawn never played anything. Now it does. The way the script is set up, the flag had always been set so it only plays for AA, it's not a glitch in the strict sense of the word since the code played out exactly as intended. Although it's of course your right to want a mod to change his reaction, it's worth saying that Larian hasn't changed previously existing content, but added missing content instead.