Bug repro: Scroll through news feed Click on comments to view them Click on a reply to view reply thread Click on in-app back button in the upper left (next to "Replies") OR use Android gesture to go back to main comment thread Scroll down to another comment with replies Click on reply to view comment reply thread Expected behavior: comment replies are displayed Actual behavior: reply is briefly highlighted but nothing happens Current workaround: go back to main feed, click on Comments again