OK, so after complete flash of my device the issue is here again. I removed all the apps that I wasn't actually using and than created backup. After flashing rootfs and eMMC I restored contacts, setting and bookmarks. Then I removed those defaults installers and restored applications. And with that I installed plastick pack. Changing from default to plastic went fine, but from plastic to default everything was OK except wallpaper. And every change after that with the same result. Wallpaper stays. It's not something that bothers me much. I'm not changing themes or wallpapers much but still, I expected this to be solved after flashing. I could install apps manualy after flashing, but I have to restore settings. I have to many configured networks that I need. And I believe that contacts and bookmarks has nothing to do with that.