Chests items are turning into other items

Partner Rank: 2

Verification builds: 1.16.100.57, 56
Regression builds: 1.16.100.55, 54

Summary: Chests items are turning into other items

Impact: Chests are one of the only way we can give player items. If ANY of the items go missing or are deleted, or changed into something else it can have drastically negative impact on the player experience ranging from sadness and frustration to being unable to play the map at all.

Repro Steps:

1. Start Extreme Snowman Speed Battle from the marketplace
2. Teleport to 157 3 22
3. Open the chest

Expected Results: Inside the chest should be a number of shovels

 

Observed Results: The items are now banners!

 

Notes: Resurgence of MCM-1141