Infill error: Non-uniform lines infill

[nihi 0]

Hello community,
I have a problem when slicing a part with an 83% lines infill.
In some random layers and positions in the component, errors in the infill can already be seen after slicing in Cura 5.5.0, which are also visible when printing with the Ultimaker S5.
The extruder does not move parallel to the previous line, but at an angle. Also, instead of a U at the end of a path, it makes an 8. This is perhaps easier to see in the following pictures. I have already tried to change some settings. However, the problem also occurs with other infill densities (80-90%), as well as with other components. Even a different positioning on the printer bed does not solve the problem. As the print is intended for CT imaging, these printing errors can be seen in the printed component. I would be pleased to receive ideas on how this can be prevented or subsequently corrected. In the attached file, the error occurs in layers 158, 174 and 250, for example.
Many thanks and best regards!

 

UMS5_Kegel_Druckfehler.3mf UMS5_Kegel_Druckfehler.ufp

[gr5 2,176]

I see the issue you are talking about above.  Very strange.  I tried your 3mf file in cura 5.4.0 and it sliced fine.  I noticed 2 things:

1) Layers 158, 174, 250 were fine

2) Only top/bottom layers should be yellow and for me only top/bottom layers were yellow.  But you show yellow layers in the screenshots above! For me the layers were "infill" which is orange.

 

So something is very strange with your version of cura.  I think this may be a known bug.  Anyway I strongly recommend you install and use Cura 5.4.0.  It's okay to have multiple versions of cura installed at the same time.