From experience, here is something you might investigate. Your outhaul
line will go through a block on the boom that slides in a T-slot in the boom. As you unfurl the sail the block slides back in the track towards the aft end of the boom. And as you furl the sail, the block slides forward toward the mast
. All good so far. There will be a "stop" installed in the T-track in the boom somewhere towards the mast
. (At least there is on my boat.) If the "stop" is installed too far aft, it will allow the furler
to apply too much tension on the foot of the sail and not enough tension on the leach which will allow the leach to bag up when entering the slot in the mast and cause wrinkles. The same thing will happen when deploying the sail, again, causing too much tension on the foot relative to the tension on the leach.
Try moving the "stop" all the way towards the mast and see where the block wants to settle when the outhaul
is under tension. The block will orient itself in a position that equallizes the pull on the foot and the leach throughout the process.