Looking at the startup and restart behaviour of the app…
This affects Qu-Pad and QuYou, and probably QuControl as well…
When a connection is lost the app should be retrying the connnection already – if it eventually has to give up then it should offer a reconnect button, not drop back to the home page.
These retries (and the reconnect button) should remember the user/password for the login.
The same should happen if the iDevice has been locked, or switched to another app. It should always try to reconnect as per the last session (unless that session was a demo).
Whilst the password probably shouldn’t be saved from session to session I’d suggest that the app should try its last connection on startup – I suspect most people connect to the same mixer each time…