When viewing a commit, clicking a comment link that was created "off page" ("show more lines") will not display that comment (BB-7569)
Sometimes when reviewing a commit one will want to browse beyond the default lines that were displayed (by clicking "show more lines") and create a comment there. When another user wants to view this comment they can click the comment link at the top, which will take them to the default lines that were displayed, but the comment will be still off page for them (they will also need to click "show more lines" to see it, but now they don't know if they need to go up or down, and how far).
When there are "off page" comments, these should be displayed.
I would suggest displaying the comment lines like change lines and displaying them along with the default 3 lines of context.