2014 CVO when it gets hot in traffic at lights the bike will stall for no reason at will sometimes puff out the breather. Not a good thing in heavy traffic anyone else having this stalling problem
Is the bike stock? If so, insist Harley fix it since stalling is considered a safety defect.
Many people have had similar issues, and with more than one root cause reported, so there isn't necessarily going to be a simple answer to your question. Perhaps it's a problem with the throttle body as reported by some folks, perhaps it's something as simple as an air leak causing the bike to run even leaner than usual, hard to say. But it is not normal or acceptable. Find a competent tech (not necessarily an easy task I know) and have them do some diagnostics.
Jerry