I have had this happen fairly often with the fusibles. One thing I find is timing. After I have fused it, I let the stack sit for a few hours before turning. This has helped, but, if sit to long, same problem (!). I make dozens of fold n stitch wreaths and I want them to hold up for my customers and be able to be gently washed. So, what I have done is after turning and pressing and topstitching, I do an additional decorative stitch diagonally thru the square. This stitching shows from the outer edge down to the center and not only adds a bit of design but firmly holds everything together. I'm not sure why the fusibles aren't sticking. I have been using them in the same manner for years and it has only been the last few months that this has become an issue. Perhaps the vendors are using less or cheaper sticky stuff!