The layers delaminating is very possible but it coming off the frame is something else. You can see all that is on the frame is glue, not even parts of the spider. Every sub I’ve built to do a rebuild to change it and taking the spider off parts of the spider would be left behind on the entire landing. It’s a clean release from the area he is showing. Any frame especially a 12 spoke where the landing doesn’t have a lot of surface should always be taken down to raw aluminum, cleaned and degreased before gluing. I’ve never had one let go doing it this way on any frame.