The content area you are editing may have lost focus. This can happen when clicking the 'Backspace' key while editing an image or other resizable element.
• Clicking the refresh button on the toolbar to restore your content to the last undo point.
• Using the 'Delete' key when deleting images or other non-text content.
• Avoid clicking the 'Back' or 'Forward' buttons on the browser while modifying content in this editor.