INTERFACE BUG

[byedgarfilho]

I don't know what is happening. But something isn't right! 
Somebody can help me?! 

[Kim Calland]

My first suggestion would be to uninstall and reinstall the app.

If that doesn't fix the problem, next I would try deleting your Illustrator Settings Folder incase it's corrupted.

Process to delete the settings folder

Windows users

1. Quit Illustrator

2. Open Users > [username] > AppData > Roaming > Adobe > ...

3. Locate the Adobe Illustrator [version] Settings folder and move it to Trash.

4. Restart Illustrator

macOS users

1. Quit Illustrator

2. Open [username] > ⁨Library⁩ > ⁨Preferences⁩ > ...

3. Locate the Adobe Illustrator [version] Settings folder and move it to Trash.

4. Restart Illustrator

Astute Graphics have made a blog article on all this info if you need any more guidance: https://astutegraphics.com/support/tutorials-and-troubleshooting/deleting-illustrator-settings

[Monika Gause]

When was the last time you rebooted the computer? Maybe now would be good?