@Flying W Thank you for the reply and for touching on so many points! Yeah, it's either normal behavior or maybe a loose axel (or another loose component in the vicinity). I didn't notice it during the first day or so, but I was not deliberately looking for this sort of behavior. After noticing it, it hasn't worsened. So far it is pretty subtle, and it is no where close to tossing me off the wheel.
For now I'll keep an eye on it, although the v12 isn't going to get much use over the winter, so I'll see if anyone else in this forum chimes in on this.
@JordanEUC Welcome! I'm actually new here, too... and quite new to EUCing. I bought my "learner wheel", a KS 14M, late September. The v12 arrived early November. I'm currently waiting to receive my order for Grizzla Pads. In terms of pedal upgrades, I'm waiting for a compatible model to be available with the following features: honeycomb or similar design; pins or screws for grip; adjustable angle. I believe pedals designed for the v11 are compatible. I'm leaning toward something from NyloNove.
If you go by the same handle on YouTube, I'm looking forward to checking out your future v12 videos!