Pogs Not Respawning

Not sure if this is intended or unintended, but pogs don't spawn/respawn if killed. Once a pog is killed in your world, they are gone forever (or until you world hop). Some people may dislike them, some may like them, but it still feels like they should be renewable to some degree. Seems like most mobs are "renewable" to some extent, so perhaps these are supposed to be or can be as well? If not a bug fix, perhaps could be a QOL change in the future?