When I follow a network link posted in comments, it successfully opens up the new post (in the app, not browser). When I click the back button to return to the previous post, it kicks me back to my launcher. Not cool.
It happens for any network links in comments, whether it's a generated "possible duplicate" or a manually pasted in link.
To be clear, this is not a crash. It just goes back to launcher as if the comment link clears the normal activity/task stack. When starting the app again from the launcher, it goes to the normal "feed" activity with no back stack.
Links in questions and answers work as expected.
To test, I'll comment below with a link, and add one here as well:
Nexus 5, Android 4.4, App version 1.0.15
Back, open again (directly goes to to MSO, not Feed).