Steps to reproduce:
1. Click layout on content.
2. Click add block.
3. Under Inline Blocks, select Basic Block.
4. Click Maximise button of Ckeditor to maximise the editor.
5. Enter fullscreen mode, and hover on the top menubar (on macbook).
6. In windows enter fullscreen mode, now exit the fullscreen mode.
7. The Ckeditor exits the full width and the broken layout builder is visible.
Please see the attached screen shot.
Observation:
1. Layout Builder is using the OffCanvas.js to manage the layout.
2. On maximize of ckeditor, the oofcanvas js sets the fullwidth of the layout.
3. On entering or exit the fullscreen mode the Offcanvas.js changes the width of layout builder csanvas. This breaks the layout.
