This happened to me twice. Someone flags my question as duplicated and only when I visit the question I notice the comment. Before I had no proof, but today I have *evil laughter*.
This is the notifications:
I count 4, remember this number.
Lets see... umm... 1, 2, 3... 5! HA! So, there are 5 comments and one of them (the one that flagged the question as dupe) didn't get into my inbox. So, is this by design or I really should get notified?
If this is by-design, I disagree.
Note to self: I suspect other canned comments doesn't reach the OP, like the custom close reason.