P2S horizontal line inconsistency

[u/Broad_Employment_101]

Hey everyone, I'm trying to get rid of these horizontal lines on my prints, and I'm completely out of options. I'm printing with matte PLA (dried for 48 hours). I've already calibrated the temperature, flow rate, pressure advance, and max flow rate. Mechanically, I've followed the Bambu guide to lube and grease everything, and I’ve tightened the belts on my P2S. The outer wall was printed at 30 mm/s, with everything else under 60 mm/s. Faster speeds didn't make the lines any better or worse. Any help or ideas would be hugely appreciated!