Hi there,
Sorry to hear about this. This is really unusual behavior. Would you mind sharing version of the OS & Illustrator? It'll help us assist you accordingly.
You may also try resetting the preferences of the app and see if it helps. Please follow the instructions below to do that:
For MAC
- Close all Adobe applications.
- Go to locations
- ~/Library/Caches
- ~/Library/Application Support/Adobe
- ~/Library/Preferences
- Rename Adobe Illustrator, com.adobe.illustrator and Adobe Illustrator 24 Settings folders to Adobe Illustrator.old, com.adobe.illustrator.old and Adobe Illustrator 24 Settings.old
- Launch Illustrator from the Creative Cloud.
For Windows
- Close all Adobe applications.
- Go to Location C:\Users\user\AppData\Roaming\Adobe
- Rename Adobe Illustrator and Adobe Illustrator 24 Settings folders to Adobe Illustrator.old and Adobe Illustrator 24 Settings.old
- Launch Illustrator from the Creative Cloud.
**Please note that resetting preferences will remove all the custom settings and Illustrator will launch with default settings. This way all your old settings will be saved in .old folders and Illustrator will recreate new folders with default settings.
Let us know how it goes. Looking forward to your response.
Regards,
Ashutosh