How to reproduce:
1. Create a new Unity project
2. Import the attached “example.unitypackage” into your project
3. Create a new GameObject called “Child”
4. In the Inspector window, set the Transform component's Z Rotation value to 45, 135, 225 or 315
5. In the Inspector window, add a Mesh Collider component and assign the imported “SM_Heart” mesh to it
6. Create another GameObject called “Parent,” and in it nest the “Child” GameObject
7. Change the “Parent” GameObjects Transform component's Y Scale value to 10
8. Observe the Scene view

Actual result: The Mesh Collider of the “Child” GameObject is rotated and scaled uniformly
Expected result: The Mesh Collider of the “Child” GameObject is rotated and skewed according to the parent GameObject

Reproducible with: 2023.1.0a4 (77dfbc7234b7), 6000.0.71f1, 6000.3.12f1, 6000.4.1f1, 6000.5.0b1, 6000.6.0a3
Not reproducible with: 2023.1.0a3

Reproducible on: Windows 11, macOS 15.6 (by user)
Not reproducible on: No other environments tested