Overachiever side switched

Er

Has anyone had their overachiever boob switch with the slacker side? My right side used to produce a lot and had a pretty significant flow with letdown. Recently the left side has been producing a lot more the the right side has diminished. I don’t have a clogged duct or any issues with either side. They just seem to have traded places. Is this common or something that doesn’t usually happen?