The following procedures seem to reproduce it every time:
- Find a question
- Click on any user's name
- Click on any site's name
- Click the back button on the top left of the screen
- Instead of going back, it opens the left panel. Clicking the physical back button on my phone works, however.
Here's a walkthrough on the bug. This is ran on ARC (the same behavior is seen on a physical device). Tested on the latest version 1.0.60.