It seems that about half the time, Apple people tell us to file duplicates because it helps prioritize things, and the other half of the time they tell us not to file duplicates because it's already being tracked. This is really confusing!
each product team at Apple is different. some pay close attention to duplicate counts when prioritizing radars, others don't.
if instead you wanted to read between the lines: please file a dupe (we have no idea when that will be fixed.) no need to file a dupe (oh cute, you're still running that ancient public build?)
