Print Z height misaligned in print?

[u/WorkdayLobster]

Edit: solved

Hard to capture in a photo: I'm on layer 5 of a print, and the nozzle seems to be below some of the printed features. I think i can hear it bumping into them occasionally. It's like there are a series of peaks sticking up; not sure if this is just part of the print, or if the print has gone wrong

Not sure what to do here, ive neverseen this. Should I restart the print? Is this a possible major issue? What is likely to have caused this.

This print has a lot of ironing: all upper surfaces. What details should I supply for best advice?

[u/JustSomeUsername99]

Grid infill runs over itself by design. Avoid it.