If two windows (stages) whose respective scenes have a custom cursor are opened and placed side by side, moving quickly between these a couple of times changes the cursor to default. In such a case if you move the cursor to window title and back, it regains its custom shape. It does not matter whether the these cursors are same or different from each other.
Steps to reproduce:
1. Unzip the attache file and run the application.
2. Click on the 'Open Table' button to open a table view.
3. Open another window by clicking 'Open Table' button on the parent window.
4. Place these two windows side by side and move quickly between two.