User receives password URL on an iPad, opens it, loads the destination login page, switches back to password tab, but it's gone forever because the iPad closed it to harvest memory.
User gets URL via webmail on Chrome, Chrome pre-fetches the URL. User closes Chrome because Starbucks is closing. When she finally visits the URL for the "first time" it's nuked.
User gets URL via webmail on Chrome, Chrome pre-fetches the URL. User closes Chrome because Starbucks is closing. When she finally visits the URL for the "first time" it's nuked.
Etc. etc.
Unexpected behavior is unexpected.