Items are deleted when dropped onto some menu icons

[FinnChildress]

Describe the bug When placing an item in the "Buy now price" icon or the "Close menu" icon, the item is deleted

To Reproduce

1. Open /ah
2. Open the selling menu
3. Drag and drop an item onto either the "Buy now price" icon or the "Close menu" icon

Expected behavior Item either gets dropped on the ground, goes into the players inventory, or goes into the selling slot

Screenshots

Server Information (please complete the following information):

• Provide the server version 1.17.1
• Provide the server jar (ex. paper/spigot) Purpur
• Plugin Version 2.75.0

Additional context The issue goes back to at least v 2.70.3