I’ve got one too. Mine does the same thing with the mouth. It does deflate from time to time as well. This is an older pic but I’ve had this one for about 5 years or so. At one point I thought I lost it early on. It got super thin and started loosing a ton of flesh so I just threw it in my sump. I assumed it was a goner and never gave it another thought… About 8 months later I noticed it was still alive in my sump. Completely white/clear and fully recovered. I slowly acclimated it back to the light and it’s alive and kick’n with full color for about 3 years now. I’ll have to find a more recent pic. It’s at least 50% bigger than in this pic now.