Mobs spawned by renaming Spawn Eggs will despawn despite of them being named

So I made an Iron Farm in a creative flat world and spawned in Husks for the Villagers to panic and spawn mobs and I renamed the eggs. However when I came back after working on another thing, they were gone. So I tested again and set my entity distance to 500 and went FAR away and the Husks were gone. Needs to be fixed ASAP