I used 1password on Android to generate a password and typed it in to set a password on a web form on another machine that can't link to my 1password store in dropbox. Then I accidentally closed out of 1password on Android.
The result was that the generated password was permanently lost and I actually had to go through the password retrieval routine on the relevant web site.
I'm not sure if it's necessarily required to store the password more than temporarily under these circumstances, but I shouldn't be able to use the password in a web form and then be completely unable to retrieve it minutes later. Maybe passwords that are generated in this way but not saved should be put into the Trash where they can be retrieved. Alternatively, any generated password could simply be saved. It can always be deleted by the user later.