Attribute Modifiers Are Not Preserved After Player Death

Attribute modifiers applied through the /attribute command are not preserved after the player dies. When a modifier is added to an attribute such as minecraft:max_health, it works correctly while the player is alive, but is completely removed upon death. After respawning, the attribute returns to its default value, as if the modifier had never been applied.

This behavior affects attribute modifiers added with commands like:
attribute @p minecraft:max_health modifier add <id> 20 add_value
Steps to Reproduce

1. Run:
   attribute @p minecraft:max_health modifier add <id> 20 add_value

2. Die (for example, using /kill @p)

3. Respawn

4. Run:
   attribute @p minecraft:max_health modifier get <id>