CanPickUpLoot tag is off for all spawned Zombies

Zombies (or other mobs) spawn with a 0% probability to spawn with the CanPickUpLoot activated. When I manually spawn zombies and scatter some items around the place, none of them pick the item up but a large amount of zombies should've picked at least one of the items in past versions. I summoned a zombie with a CanPickUpLoot tag on and they were able to pick the items up without any problems.

Is this a bug or an intended change?