Besides, in your example, either kind of gap could be a bug or a missing feature. It's a totally orthogonal question.
And what about the + symbol?
No, it just hinges on common sense. "All parties" are never gonna agree on everything.
There will always be customers that demand whatever and treats its lack as a bug. Doesn't make it a bug anymore than me asking for a free glass of wine with my meal and not being given any is "injustice" - when the restaurant never promised any.
Common sense doesn't exist in the business environment.