Syntheticocean said:
Worst case scenario I'll be burning the body, and making a new one myself. My glue joints hold. Period.
but I'd wager the glue joint didn't break; the wood delaminated along the grain. It happens, especially on softer, straight-grained woods like Poplar. It usually takes some heavy stress to do it, but it's surprising how much stress a hunk of wood can exert while drying. If I had to guess, without any evidence of trauma, that's what happened here. The wood shrunk more than its own integrity could take, so it split.