Colors are sliced wrong when using multiple parts

[ZizzyDizzyMC]

Is there an existing issue for this problem?

• [X] I have searched the existing issues

OrcaSlicer Version

2.1.1

Operating System (OS)

Windows

OS Version

10

Additional system information

No response

Printer

Bambu Lab X1C with AMS

How to reproduce

Make part with multiple files export project Import first file Color it using height tool, and fill tool to white base and black outlines on top Import 3 files for hearts Set to different fill color

Actual results

The slicer adds black infill / under layer before printing the hearts color, this is visible on a finished part.

Expected results

The slicer should not be adding colors where they are not on the model.

Project file & Debug log uploads

Heart Face - Part 1.zip

Checklist of files to include

• [ ] Log file
• [X] Project file

Anything else?