Getting "pin feathers" on my print

Ender 3 Pro, Slicr, retraction: 6mm; temp: 215; PLA+.

The pin feathers usually happen in the upper layers. Cura doesn't do this, but it's so desperately slow as an app (to load, to slice, to preview) that I'm trying Slicr, (which does everything almost instantly.)

Any advice how to avoid them?

(The top surface is another issue I can't seem to solve, but one thing at a time.)