If by leaking you mean condensate running on outside wall, I think this is "normal".
I don't think they'll do anything under warranty for that (but do let me know! If there's a fix for it I want it too
As for the fix, if this AC has discharge tube connector, it may be possible to connect the tube and run it outside far enough from the wall to drip freely to the ground.
Jay flight Slx 174BH Baja