missing stuff with B320 and EMUI 4.1

Hi, i've just updated my mate 8 to B320 and i have noticed that i can't use themes or change the lockscreen wallpaper.. basically i can only set the normal wallpaper and it will show on both screen and lockscreen, and worst in lockscreen it doesn't even dim a little the wallpaper for the words to be readable...

Does anybody knows how to solve this and get back themes support (without having to downgrade of course)??

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