u/chickencaesarwrap

Hi, I am trying to troubleshoot what is causing these raised ridges/lines on my print. I did some google searching, and it said it was pillowing, so I followed the advice to lower the speed of the top layer and decrease flow ratio, which did not help.

I am using a BambuLab P2S with Sunlu PLA Matte and a print temp of 220C.

Is this pillowing or something else? Any tips on what to try next? Thanks so much in advance.