Placeholders in names don't resolve when first created

[jojoe77777]

Description

When creating a Slapper entity with placeholders in its name, the placeholders don't resolve to the correct value until the entity is respawned to the player

Steps to reproduce

1. /slapper spawn human hello {display_name}
   Name is "hello {display_name}"
2. Reconnect to the server
   Name is now "hello jojoe77777" (or whatever your name is)