Print issues near back of the build area

My CC has been working great, right up to the past week. I'm seeing a lot of odd print quality issues, and it seems to be focused on the back side of the print (the side away from the door). Absolutely no idea what's causing it.

For example, here's the print from this morning. Polymaker PolyTerra Black PLA. Here's the front and back of the print.

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Processing img qbhi04m7z6ag1...

Any idea what to look at?