The dealers have (at least they used to) have EDSR - Electronic Dealer Service Reports - this is where the technicians tell Ford they have a problem / issue and this is what did or didn't do to fix it. Ford engineering reviews this within a data management group and determines a course of action - SSM, Hotline, OASIS Broadcast, TSB etc.
My suggestion is tell the dealer to submit one each time they get a No Problem Found. Otherwise, they have to wait for the warranty info (takes too long & is not from the technician's point of view.. )
So my point is each one of you have this issue (Including my truck) and if the information does not get back to Ford via the dealers, Engineering does not know, if they don't know they can't fix it!