Little holes in preview

[aleciuf]

Hi all,
I'm trying to print a simple screw, in preview mode I see some little holes in layers like this image:

There seem to be no problems with the model, can you please tell me if may it be just a preview anomaly?

the gCode file:

Screw.gcode

(2.38 MiB) Downloaded 86 times

Thanks

[CompoundCarl]

That just the coasting. If you turn off coasting it will go away. That's the point of the feature though. It stops extruding a bit before the end of the loop to help reduce blobs