Hi folks, low-priority UI bug.
Environment: Chrome 52.0.2743.98 on Android 5.1.
Result is an overlaid sidebar with main pane. Screenshot:
Recovery: Pressing the <hamburger button> again correctly closes sidebar.
Workaround: Always use <hamburger button> to close the sidebar. Never attempt to swipe the main pane back to the left.
Reproducibility: 100%. Many attempts.