TMI Bug

When TooManyItems spawns an item it is invisible in the players inventory untill the player right clicks with the slot or clicks on one item's slot where it would have spawned. For example if an item spawns in slots 3, 4, 5, 7 they will be invisible until your move one of them around for example drag 3 to 5 and they will all become visible.

Steps to reproduce (I'm used to Bugzilla?):
- Install TMI
- Attempt to spawn an item after installing CommandBook

首先，在安装 CommandBook 后再安装 TooManyItems，并按照列出的物品栏步骤重现该问题。跟踪处理生成物品的 CommandBook 路径，并验证出现在槽位 3、4、5 或 7 中的物品无需点击或移动物品即可立即可见。

由索引模型根据 Issue 内容生成。