Double Chest check issue

[gameusefly]

Expected behavior

When i will detect double chest (with chest inventory instanceof DoubleChestInventory) to get a double chest

Observed/Actual behavior

When a block was above a part of the double chest, it gives me everytime a single chest on check

Steps/models to reproduce

https://prnt.sc/1tnky8g (use this test code)
right click on double chest without block above part of chests -> org.bukkit.craftbukkit.v1_17_R1.inventory.CraftInventoryDoubleChest
place blocks above double chest
right click again on double chest ->org.bukkit.craftbukkit.v1_17_R1.inventory.CraftInventory

if you need a video. -> https://user-images.githubusercontent.com/77025397/134791346-f2283716-8ccb-4e67-970f-99f282ed0fd1.mp4

Plugin list

https://prnt.sc/1tnku5o

Paper version

https://prnt.sc/1tnl4nr

Agreements

• I am running the latest version of Paper available from https://papermc.io/downloads.
• I have searched for and ensured there isn't already an open issue regarding this.
• My version of Minecraft is supported by Paper.