Apparently, T130153: [betalabs] Regression: 'Mark as read/unread' box is misplaced is still manifesting itself in iOS.
Checked on iPhone 6S+ 9.2.1
- Start to press the dotdotdot menu some place close to the bottom of the screen. In the screenshot the dotdotdot menu is pressed (bold black) - 'Mark as read' is nowhere to see.
- Pressing 'Mark as unread' provides all kinds of sunset-like displays.
- 'Mark as read' tends to overlap a notification - click on 'Mark as read' and start scrolling down.