Command is not run when Enter is hit in a line comment with cursor on a last position in a file (no trailing spaces or newlines should go after cursor) for this keybinding:

    { "keys": "enter"], "command": "comments_aware_enter", "context": 
        { "key": "selector", "operator": "equal", "operand": "comment.line" }
    ] },

Happens in both Sublime Text 2 and 3

You already created a topic for this issue, didn’t you check the bug tracker before posting ?

Jokes apart, it’s either a very low priority bug, or more likely a totally forgotten bug lost in the limb of this forum: