This happens in a recent master and in rmk88--Split-screen-updates-and-color. Open a file in TEdit. I'm not sure it matters what the file contains; this may happen with an empty document also. Click the **Expanded Menu** menu item. The menu appears, but so does a break window. See the video: https://github.com/user-attachments/assets/bdf2f0e3-3be2-4df3-976c-6e8e85601af3