Here’s the criteria I use to distinguish a reportable issue from a wish-list item:
Personally I think this report falls well within the definition. Of course devs may know the behavior we are looking for is not actually mentioned in the actual design spec. But really all that matters is whether this needs fixing. Or, if you like, should it have been in the design spec?
Would it be possible for you to reconsider, Flykite, given the additional information posted above?