frogs do not create froglights when eating summoned small slime

run in to an issue whilst testing and i believe its unintended 
if you summon a slime using command "/summon slime ~ ~ ~ spawn_small 

allow a frog of any kind to eat the small slime and it will not create a froglight in stead it will just drop a slime ball 

steps to reproduce 
1 summon small slime 
2 spawn frog 
3 watch . 
this happens every time