Yeah, you should use this one to learn something, but maybe not the kind of lesson you're thinking about.
Sounds like it was made with hickory that wasn't properly seasoned. I would say it's junk, and I wouldn't bother with it.
I only ever had hickory do that once. A non-bowyer friend gave me a pile of hickory staves and they were really nice to look at, BUT, he had them stored during the summer under a sheet of plastic, just up off of the ground a few inches. They never dried, stayed moist, and degraded internally. The first bow I tried to make looked fine but stayed bent like it was braced... without the string even on it.
It you didn't mistreat it, you should get reimbursed.
And when you get to making bows yourself, make sure the wood was properly cared for from day one.