It has been detected that, when entering the pages app and edit a page, pressing the ESC key changes from edit view to preview view, using the same key a second time results in an error, we had thought it was a problem of version 6.2.15 but when we upgraded to version 6.2.18 the error persists.

Steps to reproduce the error (valid from the author demo as well):

• Open pages app
• Edit any page
• Without touching any other action or visual element, press the ESC key, you will see the change between the edit view and the preview view
• Press the ESC key a second time and the error will appear

Thanks!