Hey Scott! Unfortunately no, I haven’t figured it out yet. I feel so gaslit by my printer, but it sounds like you feel the same way.
I stopped troubleshooting/printing because I print in an apartment and I can’t always leave a window open, and my apartment will smell like PLA while printing and I don’t like VOCs. I’m building a ventilated enclosure, I plan on having it finished by next weekend so I can start troubleshooting again.
I got one reply I haven’t tested yet, in another thread of mine here: Higher wall count = z-banding - #15 by KanneKaffe