Placeholder bug

### Expected behavior I think that when the plugin is restarted, the placeholders from the Level add-on shouldn't break ### Observed/Actual behavior When I reload the BentoBox plugin using `/bbox reload`, the placeholder in my tab simply stops working Here is the placeholder: `%level_aoneblock_island_level%` ### Steps/models to reproduce 1. Install the Level addon 2. Place this placeholder in a tab or on the scoreboard 3. Reload BentoBox 4. Wait a few seconds 5. See the error ### BentoBox version BentoBox 3.14.0-SNAPSHOT-b173 AOneBlock 1.23.0-SNAPSHOT-b490 Level 2.23.0 ### Plugin list _No response_ ### Other It’s true that when you reload the plugin, it even says that something might break, but isn’t there a way to fix this problem?