Additionally, using JS API to interfere with the clipboard data is not available in some browser due to user's security matter. This is why our paste/copy tools implement the logic to detect if such action is available. If it is not supported, the user is prompted to use the native browser's keyboard shortcut (Ctrl+V or Ctrl+C) to paste or paste.
Unfortunately, due to the browser native support matter of this command we are unable to provide a consistent behavior across all browsers. Disabling the mentioned alert would be a faulty user experience and would cause issue, because the tool would pear like it does not trigger any functionality.