Describe the bug
Cannot select image size on Image block after activated Auto Cloudinary plugin.

To reproduce

1. Go to Posts > Add New
2. Add Image block on editor.
3. Choose an image on Media Library
4. Select image size on Image block settings, for example, choose ‘Medium’
   

Expected behavior
Image size will change and updated image size on actual post.
On Image Size dropdown list, all option value has different sources by each sizes.

Actual behavior
Image size will not change.
On Image Size dropdown list, all option value has same sources.

Additional context

• Wordpress 5.2
• PHP 7.3.0
• Nginx/1.15.7
• Auto Cloudinary Settings