Elliptorhina chopardi eating another roach's shed exoskeleton

Just saw a Elliptorhina chopardi molting, then after he's somewhat harden up enough to move around, he started eating an shed exoskeleton left there by another roach a few days ago. I read somewhere they would only eat their own shell, seems that although they're just programmed to eat a shed shell after molting, but probably doesn't care whose shell they're eating.

Right after he molted, note his position, and there is another empty shell on the right side.


Now he's eating the shed skin on the right hand side instead of his own.