Money keeps stacking up if you keep the gui open

[spofoh]

Minecraft Version

1.21.11

Plugin Version

v1.6.5

📌 Bug Description

I got a bug reportet from a player on our server. If the spawner is full but you keep the gui open the money will still stack up with seemingly no limit.

https://www.youtube.com/watch?v=z9_UipTFqIU

⚡ Steps to Reproduce

1. Start the server
2. Place a spawner
3. Keep it running full
4. Before its completly full open the gui wait some intervals and you will see the money keeps stacking up even if the storage is already filled up

📜 Logs or Errors (if applicable)