OSX: Full screen OpenGL application is causing high CPU Wait for GPU

When running the attached example application with the native screen resolution e.g 2560x1440 will cause very high CPU Wait for GPU number (~95%). You can see that with the OpenGL Driver Monitor tool.

If the resolution is something else e.g. 2560x1441 the CPU Wait for GPU will drop close to 0%.

To reproduce the issue more easily a secondary monitor must be connected.