Suggesting an edit to some post on the Android app
If I ever switch from portrait mode to landscape mode (by turning my phone sideways), the Edit Summary box disappears.
Before and after changing screen orientation
On the left is the normal behavior. The right image shows what happens after I switch to landscape mode and back; notice how the Edit Summary box is missing.
This problem is 100% reproducible on my phone.
Nexus 5 running Android 5.1.1, Stack Exchange app version 1.0.68.