It's impossible to escape from a macro block

To expose the problem of editing a page with macro from the WYSIWYG editor, I created a blank page, and directly add a info message macro at first. You will see, that after adding the box, I'm totally stuck and can not escapse from this block to continue editing or adding another block, images,...
And I've to switch to source mode to type 'blah blah' and then switch back to WYSIWYG to continue typing. This is so inconvenience.