Settings menu controller doesn't work correctly

Following problems discovered on Android 8.1:

Using left-headed arrow on top of settings pages must return to parent page of settings. Currently it returns to webpage. This works correctly on 4.4 (I'm not able to test on Android 5). Pressing phone "Back" button works correctly and return to parent settings page.

Selecting settings page item (general, display, privacy settings, etc.) must change page with swype to left animation (that was in 4.4), but currently page faded-in without page background. Same for returning to parent settings page: page faded-out instead of swype to right animation.