The 'Total rep awarded from bounties' mark for answers covers the controls on short answers on the iOS app.
This seems to be because the bounty box is positioned based on the vote buttons (to allow room for a possible accept mark) rather than filling an appropriately small space.
Another related bug is that these misaligned bounty boxes disappear when scrolled off the top of the screen. When you scroll back up, they are gone. On the contrary, when you scroll it off the bottom of the screen and back, it reappears.
To reproduce, visit a short answer (<8 lines or so) on the iOS app which has been awarded bounties, such as this one. Continue scrolling past it till it goes off the screen, then scroll back up. Then repeat in reverse.