Burrs on the internal parts of the print  

Burrs on the internal parts of the print

Hello,

I'm calling for your help, because I can't get better results than the following picture : you can clearly see that the nozzle loaded with black filament moves above the white area, and leaves a drip on it .

I have tried many settings, but cannot solve the problem. My equipment: MK3S - MMU3. The black filament is Nanovia PLA VX loaded with virucidal powder, which can only be printed with a nozzle of 0.5 mm or more (here, I am in 0.6 mm), otherwise it clogs the nozzle. The white filament is Geeetech PLA (prints like generic PLA).

The ambient temperature of the room where I print is 20°C.

I reduced the extrusion temperatures to the minimum that the filaments accept for a good extrusion.

I set the same settings for both filaments. I put the retraction on, but it doesn't seem to be working.

Is it because we are inside the print and Prusaslicer doen't recognize the different parts of the print ?

How to ensure that it is taken into account in the division? I've joined my print settings after the picture ; I only put the values ​​that I had changed.

Thanks in advance for your suggestions.