ive had a toadstool and other leathers for several years now and it seems my toadstool does the same thing from time to time. I freaked out the first time it happened and checked everything I could. Mine was simply "shedding" itself. It lasted a couple days and after it was perfectly fine and bigger!
This might not be something to worry about. Im not saying ignore it, Just watch it for a couple days and see if it opens up again. Do you have any pics?
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