Replaceitem prevents taking items from an entity's inventory

Partner Rank:

1

Partner Team Reporting:

Pathway Studios

Verification builds and Platforms:

Minecraft-Release_UWP_DX11_x64_4929535 - 1.16.100.04 RC4

Summary:

Running /replaceitem on a repeating command block prevents the player from taking the affected item out of the entity's inventory on that tick.

Impact:

Breaks a core mechanic in an upcoming map.

Repro Steps:

1. Create a new world and spawn a mule
2. Ride the mule until it's tamed, then use a chest on it
3. Place down a repeating command block with the command:

   /replaceitem entity @e[type=mule] slot.inventory 1 iron_sword 1 0

1. Crouch and right click the mule to access its inventory.
2. Try to take the sword from the mule's inventory

Observed Results:

Player is not able to take the sword.

Expected Results:

Player is able to take the sword.

Screenshot/Video?

Yes, attached.

Regression Builds:

Minecraft-Release_UAP_x64_4645976 - 1.16.40.02

Notes:

None.