Tested with QDS 4.6 Built on Aug 23 2024 01:23:11

1. Open 3D project
2. Go to Material Editor and change the material type to Default and name to Default -> works correctly
3. Press "Create new material" button -> Works correctly, Principle Material is created and it is highlighted in the Material Browser and seen in the Material Editor
4. Change the name of the principle material and press "Create new material" button -> Works incorrectly. New material is created and highlighted in the Material Browser, but Material Editor is still showing previous material.
5. If user goes to Material Editor and makes some changes, it affects the previous material and not the one highlighted in the Material Browser

See the video for demonstration:
qtdesignstudio_KEUydoSd9B.mp4