The left nozzle’s purge line dips at 1 or 2 points around the same part after it passes the middle of the line every time. The right nozzle doesn’t have this. I’m using the Bambu Support for PLA/PETG. I also calibrated flow dynamics. Here is 2 photos that kind of show what I’m talking about:
I’ve noticed this as well since the beginning (I don’t know if mine is only on the left nozzle though). Even on perfectly dried filament there will often be a couple ridges as if the toolhead had hitched, but watching it you can see it moves smoothly. I don’t know if it’s “intended” but it is what I’ve experienced as well and I don’t have issues with my printer
