Reproduction steps:
1. Create and open any new project
2. From the Package Manager install the ProBuilder package
3. From the Samples tab, Import the “Editor Samples”
4. From the Hierarchy, right-click > ProBuilder > Cube (to create a Cube in the Scene)
5. Select the Cube and switch “Active Context” to ProBuilder
6. Select any face of the Cube
7. Right-click and observe the custom actions

Expected result: “Set Double-Sided” option is greyed out
Actual result: “Set Double-Sided” option is available for selection

Reproducible with: 6.0.1 (6000.0.15f1), 6.0.7 (6000.0.60f1, 6000.2.8f1, 6000.3.0b6, 6000.4.0a2)

Reproducible on: Windows 11
Not reproducible on: no other environments tested