If the fullscreen view does not take the full width of the screen, it looks like it is moved to the left.
I discovered this while trying to set the contentInsetAdjustmentBehavior of ContentSuggestions to UIScrollViewContentInsetAdjustmentAlways. In that case its toolbar, used as the overscroll view, does not take the full width. The overscroll action moves the toolbar snapshot to the left.

This might happen as the iPhone X landscape position has left and right safe area insets.