Cock dock attachment

Hello! Mostly a lurker here. So I really enjoy the vacuglide and love the cock dock. I have an issue now with the piece of the cock dock that connects directly to the sleeve, (the receiver that mounts onto the poles.) It no longer fits around the sleeves. And it now doesnt slide up and down on the metal poles. Its almost like its warped? Anyone else experiencing this issue?

The only thing that could cause that is heat. Is it possible those pieces got hot?