Minecraft wiki entry for Hopper, associated text: Hoppers usually check for dropped items every game tick and they can collect items even before they are picked up by a player[verify] or destroyed by lava. However, in Bedrock Edition hoppers have a "collection cooldown" time. After collecting an item (or stack of items), a hopper waits 4 redstone ticks (0.4 seconds, barring lag) before attempting to collect again.