Wiping while retract wrong path on single line

[eurohell]

Description of the bug

If the object requires it to have one single extraction line, the setting "Wipe while retracting" [wipe[0]) prevents the path of the extrusion to be followed back, but instead it will wipe into any random direction, which leads to ugly strings (left object in example). On extrusions going a full closed loop (right object in the example or outer lines), everything works fine.

Project file & How to reproduce

Wiping wrong direction on single extrusion line.zip

Checklist of files included above

• Project file
• Screenshot

Version of PrusaSlicer

2.9.0-beta1, 2.8.1

Operating system

Windows 11

Printer model

MK4

[hejllukas]

Hi, thank you for your report. I was able to reproduce your issue.
I created an internal issue, no. SPE-2627.

[lukasmatena]

Should be fixed in PrusaSlicer 2.9.1-alpha1. Closing.