ID 565629 - Meshes turn red in Advanced Viewport on macOS when separated

Problem summary
Meshes turn red in Advanced Viewport on macOS when separated.

Customer reported version
Modo n/a

Customer reported platform
macOS 14 Ventura

Steps to reproduce
1) Download the attached scene file and open it in Modo on a macOS.

2) Set Viewport mode to Advanced.

3) Go to Viewport Settings (O key) and in the Advance tab change Curvature Display to Viewport.

4) Right-click the mesh item and select unmerge.

Expected behavior
The multiple meshes should not turn red in the Advanced Viewport.

Actual behavior
Multiple meshes turn red in the Advanced Viewport.

Workaround
Unknown.

Reproduced by Support in:
Modo 16.1v8 - macOS 14 Ventura
Modo 16.1v1 - macOS 11.7 Big Sur

Unable to reproduce bug in:
Modo 16.1v8 - Windows 11
Modo 16.1v1 - Windows 11

Earliest version tested
16.1v1 - This feature did not exist before this version.