Can be because Bub prefers one side to the other. But my right breast is always more full. My first born only ate from right side after 6 months and I was lopsided for 2 years 😂 Not sure of advice other than maybe feed first on lower side and offer more feeds? I think it’s quite common
I have added a 3/4am power pump on my slacker left side recently and it seems to be working to up the supply. I don't pump any other time I just let her feed directly and I always get her to start on the left side and then just top her up with the right side to try and even them out a bit.
Pumping more on the low side helped me :)
I’ve seen a dip in my supply as well. I’m not sure what I did or what happened to it, but I was gradually increasing day-to-day and now I’m barely making enough for a full feed for my baby. Really disappointed as I’m not sure what to do.