Non-weapon based items can't be placed inside an Armor Stand's hand

Partner Rank:

Critical

Verification builds and Platforms:

1.9.0.5_beta_9-4_rc1_UAP_x64_1592619

Summary:

Non-weapon based items can't be placed inside an Armor Stand's hand

Impact:

Completely breaks current marketplace content. Restaurant Sim uses food items in armor stand's hands to communicate to the player which food the customer requires. If this functionality is removed, the map can't be fixed.

Repro Steps:

1. **Load new world
2. Summon Armor Stand
3. run the following command: /replaceitem entity @e[type=armor_stand] slot.weapon.mainhand 0 carrot 1 0

Observed Results:

No item appears in the Armor Stand's hand

Expected Results:

**Carrot appears in the Armor Stand's hand.

Screenshots attached:

Yes

Regression Builds:

1.9.0.3_beta_9-3_UAP_x64_1452920

Notes:

This is a critical bug for us since it will completely break the map starting in 1.9 with no way to fix it. It would be the first map we had to remove from the Marketplace, and it's a shame since it's a highly regarded map.