I’ve tried over the course of years to imagine any legitimate reason for it, even any technical reason for it, for why you might ever do it. None comes to me. I

I’ve tried over the course of years to imagine any legitimate reason for it, even any technical reason for it, for why you might ever do it. None comes to me. I do not believe that any legitimate reason exists: I suspect it was just a badly-thought-out arbitrary technical decision from quite a few years ago when the impact would have been felt less often, and which they haven’t been willing to revert, if they’ve even noticed any complaints. As for “find out why”, I’ve tried contacting them, multiple times by two or three means, and never received a response, including by one form where they explicitly guaranteed a response to every enquiry.