That is the first one i got from you I had it on the bottom the whole time then after I added the other leather this is what happened I put it up in the tank and it folded over so I put it back on the sand and nothing I noticed the other leather is shedding so that can be it just not sure they aren't close to each other
That leather did that in my tank as well. Give it some time and it will open right up. And then one day you will come home and it will be closed up again.
Leather's get a wax'e film over them when they are stressed put it low in the tank and put a power head on it for a day or so.... this has worked for me in the past....