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I've read in several places that using back off speeds and clean nozzles can help. I'm running with a new nozzle. Travel speed 150, retraction speed of 20, print speed 50. I think some of these are just defaults with cura 5.4 but I get the same thing with a higher retraction speed. What else should I look at?
Maybe your nozzle is too hot or your filament is wet (although it does not looks wet).
Try set a lower nozzle tempereture and drying your filament.
Also, I suggest to print a temperature tower to see what's the best fit of this filament with your printer