Something similar happened with my rye starter last winter. My kid left her bluetooth speaker next to the jar for a week straight, mostly rap and some electronic stuff, and that thing went nuts. Bubbles like I never saw before, rose up past the tape line every single day. When she moved the speaker to her room, it went right back to normal within two days. I started putting my phone by the jar during feeds after that and got good rises almost every time. Not sure if it's the sound waves or just the vibration shaking things up, but it seems to do something. Could also be a total fluke and we both just got lucky batches.

Man, that's such a classic Blender moment! Honestly, I think half the tricks I know in that program came from me accidentally hitting buttons while frustrated. But your mug thing actually speaks to a bigger pattern I notice everywhere, sometimes you gotta step back and flip your whole approach instead of fine-tuning the broken part over and over. Like when I'm trying to write a sentence that just won't sound right, rewriting it backwards or starting from the end usually cracks it open. Same with fixing a squeaky door hinge, you can keep tightening the same screw or just flip the whole hinge plate. There's something about forcing a mirror image or a fresh angle that shows you exactly where the lopsidedness lives in the first place. So yeah, maybe Blender's teaching you a life lesson, not just a modeling one, ha.