What is this?

[DudeUser 0]

Hey,

does this look normal?

I mean the orange and the small gaps. I have also some gaps at this position in my prints.

[gr5 964]

good question. I'm not sure of the answer - this is a new slicer (cura 2.x) and I have never seen the orange before - not sure what that is. You can increase infill overlap from default of 15% to 50% or 100% to see if it fixes this but I've never had to do that. Maybe you have some play in your print head - e.g. belts too loose or too tight but unlikely with UM2plus. If you have gaps I would try printing at half speed and I think ti will fix your problems (just set to 50% in TUNE menu while printing).

[DudeUser 0]

It is gone when i increasing the wall thickness from 2 to 3 wall lines.