preview shows nothing for spiral-mode on voron profile

[Christian-B-ger]

Description of the bug

when i set spiral vase mode and click on slice, the preview shows on the left some gcode, it shows the nozzle, but no part on the voron profile
if i use for example the mk3s profile, that works properly, without the gcode and the tool, but with a part ;-


)

Project file & How to reproduce

Form-Kubus.zip

Checklist of files included above

• Project file
• Screenshot

Version of PrusaSlicer

2.4.1 +win64

Operating system

Windows 10 21H2

Printer model

voron 2.4 with afterburner / MK3S (via octoprint)

[rtyr]

This issue was already reported here #8032. It is already fixed on master. For now, it can be avoided by adding G1 Zxx to your start g-code (for example G1 Z0.2). I am closing this as a duplicate.