Reproduction steps:
1. Create a new project
2. Install Entities package (Window > Package Management > Package Manager)
3. Window > Entities > Systems
4. Press “Show System detail view” button in the Systems window
5. Observe System detail view
Actual result: System detail view is not visible
Expected result: System detail view is visible when enabled
Reproducible with: 6.5.0 (6000.6.0a6), 6.6.0 (6000.6.0b7), 6.7.0 (6000.7.0a4)
Couldn’t reproduce with: 1.4.8 (6000.0.81f1, 6000.3.21f1), 6.5.0 (6000.5.7f1, 6000.6.0a5) (No “Show System detail view”button)
Reproduced on: macOS Tahoe 26.5 (M4), Windows 11
Note: Issue is not reproducible when Systems window is large enough