Non-ringing artifacts - what is it?

I'm getting these weird vertical lines in my prints, both in X and Y. After doing a klipper ringing tower test, I can conclude that they have the same frequency as the machine's ringing effect, but they're still there even after applying resonance compensation. The first pic attached has resonance compensation turned off, and the second has resonance compensation (MZV) turned on. Ringing gone, vertical lines still there, both in X and Y... Does anyone have any idea?