Background downloading as in uc browser means exiting the browser with download still being continued in background.

Activate single column view then u can easily login

Still many pages fail midway while loading and many sites shown blank white.
In private browsing mode auto logout problem.
Why need to sign in opera every time and whats its use if it cant sync bookmarks from opera mini to mini beta.
Also data savings needs to be improved.
Suggestions-
Night mode, Udisk like feature,and opera link

Overall a better update this time hope u consider above problem in next update.