Hi guys, maybe someone could help me to figure out what should I adjust

Hi guys, maybe someone could help me to figure out what should I adjust to overcome these flaws that Im experiencing now. I have been printing these flute parts out of PLA based wood fillament from Form Futura. On photos you can see something like underextruded arreas at the start of almost every new external perimeter. You can see that it repeats on various places. Im printing with 0,8mm nozzle at 0,5mm layer height at 220°C. If you know about some other parameters that can cause this just ask I will check them.
Looking forward for your answers.
Dárius.

What slicer are you using? Might want to check some things like your retraction, coasting, random start…

Hi Jeff, thank you for your interest. I have used the Cura slicer inside Repetier Host. I can upload screenshots of settings.

@Darek_K Post some screen shots of your settings and we can start there. Do you get this effect with other filaments or just this one?