I can consistently reproduce a window geometry issue in Adobe Illustrator after exiting Presentation Mode.
After pressing Esc to leave Presentation Mode, the Illustrator document window returns with an incorrect size that extends beyond the visible area of the built-in MacBook display.
The issue only occurs on the built-in display. If Illustrator is moved to an external monitor, the problem does not occur.

System
Adobe Illustrator 30.6
macOS Tahoe 26.5.2
MacBook Pro 14-inch (M4, November 2024)

Steps to reproduce
Launch Illustrator.
Open any document.
Make sure the document window is on the built-in MacBook display.
Enter Presentation Mode (Shift + F).
Press Esc to exit Presentation Mode.

Expected result
The document window should return to exactly the same size and position it had before entering Presentation Mode.

Actual result
The document window returns with incorrect geometry.
It appears as if Illustrator restores the window using an incorrect display size.
The restored window extends beyond the visible display area.
Clicking the macOS green zoom button temporarily resizes the window correctly to fit the display.
However, clicking the green button again restores the previous (incorrect) window size that extends outside the screen.
It looks like Illustrator stores an invalid "normal window" geometry after exiting Presentation Mode.

Additional observations
The problem occurs 100% of the time.
Only affects the built-in MacBook display.
Does not occur on an external monitor.
Happens with every display scaling option ("Default", "More Space", etc.).
Started immediately on a brand new MacBook Pro M4.
The same workflow worked correctly on an older Intel MacBook Pro (2015).

Troubleshooting already performed
The following had no effect:
Reset Illustrator preferences
Disable Rectangle window manager
Disable "Automatically fit below built-in camera"
Test different display scaling options
AppleScript window activation
macOS window management settings
No incorrect NSWindow Frame entries are stored in the Illustrator preferences.

Suspected cause
This appears to be a regression in Illustrator's window management on modern MacBook Pro models with a built-in display.
After exiting Presentation Mode, Illustrator seems to restore the document window using incorrect display geometry (possibly related to the built-in display safe area / visible frame), while external displays work correctly.