Inventory issue in Grid Runners causes situation where players can't complete the cake room.

Partner Rank: 2

Partner Team Reporting: Noxcrew

Verification builds and Platforms: Minecraft - Release_3381509 Minecraft.Windows_1.13.35.0_x64_UAP.Release_Test

Summary:

The cake room in the Emerald course suffers from an inventory bug where players lose the ability to move buckets from their hotbar to the crafting window. I'm struggling to see exactly what's happening here, but when you click milk buckets in your inventory they either empty or just don't go with your cursor. I found if you click and hold on the item it sometimes works as intended, and sometimes doesn't. It's important to note that using the crafting recipe window to auto-populate the recipe allows you to complete this with no problems.

Impact:

Grid Runners is a pretty popular map (it's free!). This bug causes one of the courses to soft-lock if players are crafting using the default Minecraft crafting system.

Repro Steps:
1. Download Grid Runners from the store.
2. Load the map and press the start game button
3. /setblock 3009 6 3026 redstone_block [this should unlock the emerald course]
4. Play the Emerald course until you get to the cake room
5. Grab 3 buckets from the bucket shop
6. Use them all on the cow to get 3 buckets of milk
7. Open the crafting table and click on a milk bucket to try to move it to the crafting window

Observed Results:
You are mostly unable to pick up the milk buckets, and clicking on them sometimes has a chance to randomly empty the bucket.

Expected Results:
You should be able to interact with the items as you normally would in an inventory.

Screenshots/Videos attached:

https://drive.google.com/file/d/1SYryUbwkEV3_lWt2P6WFO94IGp-u7vCJ/view