Low breastmilk on one boob

Anyone deal with with this?

On the right side I can produce 5-6oz of milk on a 15 min pump cycle, but one the left size I’ll be lucky if I hit 2oz. I usually pump every 3-4 hours.

But weirdly the boob is still full. It’s like the left boob refuses to pump, I usually have to breastfeed my LO after to get the rest of the milk out or it’ll start to hurt real bad and get heavy