Strange holes in imported STEP file

[theosib]

Bambu Studio Version

1.9.5.51

Where is the application from?

Bambu Lab Official website

OS version

macOS Sonoma 14.5

Additional system information

MacBook Pro with M2 Pro

Printer

X1C

How to reproduce

• Create new project.
• Import STEP file (attached)
• Look at imported model

Actual results

There is some incorrect geometry in the imported model.

Expected results

I also tried importing the STEP file into FreeCAD and PrusaSlicer. It's fine in both cases. Only Bambu Studio has a problem with it. knurl-Part.step.zip

Project file & Debug log uploads

I don't think you need a project file. But I made one just in case you really need it. knurl-PartCut001.3mf.zip

There is no crash, and there's no log from today anyway.

Checklist of files to include

• [x] Log file
• [X] Project file

[ttt888zzz]

HI theosib：Please try the following the steps

[MackBambu]

Have you tested 1.9.5.52 ? I didn't reproduce this issue.

[MackBambu]

There are some problems with this step model. The model is not closed and some faces are missing.