Some posts can't load the comments
The "+" button to open related posts from the Meanwhile feed will open the referenced posts, but you won't always be able to see the comments.
Basically it will fail if the activity is about "something in reply to something else", and "something else is in a server different from yours.
When that happens, you'll see a "Unauthorized" error in the status bar.
It should always work for activities such as "JohnDoe favorited a note" or "Jane updated an image".
This is due to a missing field in the data provided by the Pump.io core in those situations. See pump.io issue: https://github.com/e14n/pump.io/issues/873
Milestone changed to DependsOnCoreToggle commit list
This has been enhanced in v1.3.0-alpha.
Now, loading the comments should always work if the referenced post is, or has ever been visible in any of the timelines. In that case, the necessary proxy data is stored on disk for future use.