Why Did My Data Disappear When I Pressed the Backspace Key While Editing a Record in Salesforce Classic?

Some versions of Internet Explorer use the Backspace key as a keyboard shortcut for the browser’s Back button. When you press the Backspace key and your cursor is not within a text field, the browser goes back to the previous page. To retrieve your data and return to the page you were working on, click your browser’s Forward button.