Steps to reproduce:
1) Open the attached project.
2) Build for OSX.
3) Launch the build.
4) Tick the 'Fullscreen' checkbox.
5) Press 'Save'.
- The application goes into full-screen mode.
6) Un-tick the 'Fullscreen' checkbox.
7) Press 'Save'.

The application returns to windowed mode, however, the toolbar of the Player window gets stuck behind the OS menu bar, therefore, the application window cannot be moved or closed without using the Activity Monitor or cmd+Q. This only reproduces with OpenGL 2.0 as the graphics API and Capture Display option enabled. Unable to test with GLES or Metal (case# 817850).

Reproduced on:
5.3.6p1, 5.2.4f1

Did not reproduce:
5.3.4f1