Gap Infill outside object with Classic Wall + Arc Fitting

[andcolla80]

Is there an existing issue for this problem?

• I have searched the existing issues

OrcaSlicer Version

2.0.0-rc

Operating System (OS)

Windows

OS Version

Windows 11

Additional system information

CPU 13th Gen Intel(R) Core(TM) i5-13450HX 2.40 GHz
16,0 GB RAM

Printer

Bambu Lab P1S / A1 Mini

How to reproduce

1. Exported STEP from Fusion 360 from a well know project
2. Imported in Orca
3. Selected the regular profile, used for months
4. Sliced and printed

Actual results

Noticed a compleat failure because nozzle hit in a non-object extrusion. Realized Orca is slicing lines outside the object wall when I use Classic wall + Arc Fitting + 3 walls in this particular object that is round.
Nozzle fill the wall gap and when arrive the infill area it starts a line with large width and high flow. The infill is not printed.

If I change to 2 walls or disable arc fitting or change to Arachne the issue goes away.
I had the same issue with P1S and A1 Mini. Disable support and export body again did not solve.
Trying import STL had same issue in different layers.

Expected results

The walls and infill to be in the right place

Project file & Debug log uploads

orca_wall_issue.zip

Checklist of files to include

• Log file
• Project file

Anything else?

No response

[github-actions]

Orca bot: this issue is stale because it has been open for 90 days with no activity.

[github-actions]

Orca bot: This issue was closed because it has been inactive for 7 days since being marked as stale.