Coolant leak when a.c. is on

08 Pontiac g6 gt 3.5l v6 leaks coolant when
my a.c. is running but can't find leak. Yes, I
know a.c. "leaks" condensation but it's not
that, its coolant. My reservoir is almost
emptied when driving from home to work
(about an hour of driving). The times I see it
leaking it's coming from the passenger side
of the motor and drips off a piece of frame
on the bottom but can't see anything when
looking from the top of the car, even though
there is alot of water dripping, almost more
of a stream than drip. I will say I lose a little
coolant without a.c. running but we're
talking maybe quarter of an inch over 2-3
weeks, sometimes none at all. With a.c. on
its almost the whole jug in 1 hour. Pressure
test a couple months prior showed no leak.
Radiator, radiator hoses, radiator fan,
thermostat all changed last year may 2018.
Help please!!