Thanks for the feedback😄,
I'm not completely sure I understand the query but the activator cannot be activated from the front left or front right if you're not on the correct ground level. While it might seem like the activator is on the same ground level as the portal...it's not. You must go behind the walls on the bottom floor and access it.
We wanted this as a red herring since the isometric view provides such opportunities. But, maybe we did it a little too early in the game or didn't provide enough clues in the previous level.
Meanwhile, if you were trying to access it from the correct ground level and could only get it to work from one side of that activator, that's because we only have the trigger to check if the player is in range, on one side of the activator...which is why we block the other sides usually, you might've found a way to enter the other sides, which was not intentional.👀