Hi Hi!
I keep the Leptopelis vermiculatus. I currently have 14 right now

So, it does sound like the little one is shedding, which is totally normal. When I notice mine doing this I use a fogger to up the moisture in the habitat and help them out. I also will turn the rain system on which stirs the males up vocally, but it does seem that it all does the trick. If you don't have this, use a simple spray bottle and mist them about 6x a day, and make sure to use water conditioner in the water that you are spraying on them/ providing them. Good habit to get into. Best wishes with your colorful friends!
*Edit* Also, from my experience with these joyful frogs, they seem to only burrow when there is insufficient humidity, when the temp gets too high, or too many of them in a small space. The males do a territorial grrrr.. clack when warning each other, and just a clack when calling females. Hope this helps!