I just booked your example of KUL-TPE-YYZ on BR in J.

It's encoded as G1.

From https://www.malaysiaairlines.com/my/...ture-levy.html:

"Passengers will be able to view the departure levy amount reflected on all Malaysia Airlines’ Internet Booking Engine (IBE) for tickets purchased on and after 1 September 2019 (The tax code for departure levy is G1)."

G1 is also the KKC.

So it's just a display issue on Aeroplan. The amount is correct.

Now I am refunding my ticket.