To reproduce:
1) Download and open the project attached by the user.
2) Run in the editor.
3) Observe that vSync is set to 1 and FPS is set accordingly
4) Click another window so that the editor would lose focus
5) Observe that vSync is now set to 3 and FPS is set accordingly
6) Focus the editor again
7) Observe that the vSync is back at 1 and FPS is set accordingly
8) Build and run Windows standalone player and repeat steps 3 to 6 with the player window instead of the editor
9) Observe that after losing focus the first time and being changed to vSync 3 the player does not change the FPS values after regaining focus even though vSync is being set to 1

Note: Does not reproduce on Mac or UWP builds

Reproduced on: 2019.2.0a8, 2019.1.0b7, 2018.3.9f1