As I've played through the snapshots the past week, I've noticed something that really hurts the game. Certain mobs aren't dropping loot, even some on the mobs that have a 100% drop rate aren't dropping anything: after testing a bit, these are the mobs that are still dropping their normal things

• Skeleton
• Sheep
• Cod
• Salmon
• Tropical Fish
• Pufferfish
• Ravager
• Wither Skeleton
• Shulker
• Wither Boss
• Iron Golem
• Snow Golem
• Panda

While all of these mobs are dropping xp, some mobs, like Evokers and Chickens, which normally have a 100% drop rate on certain items, aren't dropping those respective items (Totem of Undying, Raw Chicken). This affects Blazes and Enderman, and this prevents people from getting to the end.