Bug report: Could not pass event EntityDamageByEntityEvent to InventoryRollbackPlus v1.8.2

### Server details:
 - Server version: This server is running Purpur version 1.21.11-2568-HEAD@f57bd86
 - IRP Version: Running InventoryRollbackPlus v1.8.2

### Bug description:
Sometimes, when a player die, an error console spam

### How to reproduce:
idk, just happen sometimes yes, and sometimes no

### Logs, screenshots & other:
https://mclo.gs/68YaWoh

#### **Additional info:**
N/A
