All? That's a lot! Only one of mine has developed this problem - annoying, but nothing more.
Well, they are all manufactured under the same patent, to the same specifications and many if not all the parts come from the same source making them all susceptible to the problem. The ones you have had are British making them clearly superior and even at that, you have seen the problem. Imagine what the rest of us, whom nature has so cruelly snubbed by denying us the honor of British birth, have to go through with this piece of crap joint. This being the case, I am quite sure I dislike every last one of them.