Bug: NPCs loosing their skin

### In which plugin has the error occurred?

FancyNpcs

### What happened?

Sometimes after rejoining the NPCs just loose their skin. If i reload the plugin or "fix" the specific NPC the Skins reappear

### In which software has the error occurred?

Paper

### Plugin version

2.11.0 (Git: 3ee8da3)

### Server version

1.21.11

### Relevant log output

```shell
No log output
```