Bridge created in space using Arachne but not Classic (perimeter generator setting)

[stillpointx]

Description of the bug

Bridge created in space using Arachne but not Classic (perimeter generator setting)

Arachne:

Classic:

Project file & How to reproduce

Just delete the zip extension at the end to open the 3mf file.

pool sander block holder-1_Sand_paper_block_holder.3mf.zip

Checklist of files included above

• [X] Project file
• [X] Screenshot

Version of PrusaSlicer

Version 2.6.0-alpha6+linux-x64-GTK3

Operating system

Ubuntu 20.04

Printer model

mk3s

[kubispe1]

• Potential similar issue: #9074 -Tested with: PrusaSlicer-2.6.0-alpha6+100
• reproduced also with default MK3s settings with layer height 0.3mm