Teleporting an entity into the void, killing it, and then teleporting the items back to the surface makes the items invisible.

Steps to reproduce:

1. Place the following in a function file or in chained command blocks:

summon rabbit ~ ~-1000 ~ {DeathLootTable:"minecraft:chests/simple_dungeon",Health:1,Tags:["loot"]}
kill @e[type=rabbit,tag=loot]
execute positioned ~ ~-1000 ~ run tp @e[type=item,distance=..3] ~ ~1000 ~

1. Execute the function positioned outside the player's pickup range. eg.

   //For a function file in the 'debug' namespace, named 'void_bug.mcfunction'
   execute positioned ~5 ~ ~ run function debug:void_bug

1. Observe; no items appear.
2. Walk towards the targeted position.
3. The items will be picked up by the player.

The items are editable by commands, however, nothing seems to cause the items to become visible until the player picks them up.

Here is a data pack that implements the above commands: example.zip

Place the data pack in a world and run the command from step 2.