As you can see, both, the start and the end of the thin lines have a defect. It seems a filamento accumulation.
I use default settings with 0.4 nozzle, 0.2 layer height and PLA filament. The only one exception is the arachne mode for walls, with its default settings.
Do you print the black before other colors? Print order can help in many situations by at least raising some stringing away from the outer surface (in contact with the build plate). Those stray bits if I’m interpreting them correct look like black was printed first? It’s not a cure. There’s something else causing a bit of stringing, but print order can help hide it a little.
There’s also a setting that tries to keep the print head over the same color that’s printing to help reduce stringing getting carried into other colors. Drawing a blank but it’s in the quality tab and once you turn it on you can select how far out of its way the extruder can wander to do that.
I have done two new test (B&W colors only for simplicity).
Option A: same settings except slower speed at first layer.
Option B: same settings except White color is the first one. This option improve the defects althought colors mixed a little bit where I point out in red.