To Reproduce:

1. Select an object with diff properties in the inspector. e.g. a material
2. Open the object selector for one of the properties. e.g. texture
3. Click a different property in the object selector. e.g. layer
4. The Object Selector window will close but the click will not trigger an event.

Expected:
Close the object selector if required and send the click event.

Note: Only reproducible on OS X