Illustrator: Basic Shortcuts Randomly Stop Working

There is a fundamental issue in Adobe Illustrator that needs attention.

The keyboard shortcuts for Arrange

• Bring Forward

• Send Backward

• Bring to Front

• Send to Back

simply stop working.

They are correctly assigned in the Keyboard Shortcuts panel.

They worked before.

They are still mapped correctly.

But they do nothing.

Meanwhile, right-click → Arrange works perfectly.

So Illustrator can execute the command — it just ignores the keyboard input.