Solved Respawn and Death event

Hello!
Can someone explain me why it is not add any items to my inventory after respawning?
Btw. when I remove e.getDrops().clear(); it works but I don't want to drop their items

Code:

package me.bigflori.boosters.Features;

import java.util.List;

import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.entity.PlayerDeathEvent;
import org.bukkit.event.player.PlayerRespawnEvent;
import org.bukkit.inventory.ItemStack;

import me.bigflori.boosters.gl;

public class SaveRod extends gl implements Listener {

    @SuppressWarnings("static-access")
    @EventHandler
    public void onSaveRodDeathEvent(PlayerDeathEvent e) {
        if(vars.saveRod) {
            if(e.getEntity() instanceof Player) {
                Player p = (Player) e.getEntity();
                List<ItemStack> drops = e.getDrops();
                vars.saveRod_drops.put(p.getName(), drops);
                e.getDrops().clear();
            }
        }
    }

    @SuppressWarnings("static-access")
    @EventHandler
    public void onSaveRodRespawnEvent(PlayerRespawnEvent e) {
        if(vars.saveRod) {
            Player p = e.getPlayer();
            if(vars.saveRod_drops.containsKey(p.getName())) {
                for(ItemStack is : vars.saveRod_drops.get(p.getName())) {
                    p.getInventory().addItem(is);
                }
                vars.saveRod_drops.remove(p.getName());
            }
        }
    }

}

EDIT: Solved by myself
Everything the same only this changed:

Code:

if(e.getEntity() instanceof Player) {
     Player p = (Player) e.getEntity();
     List<ItemStack> drops = new ArrayList<>();
     drops.addAll(e.getDrops());
     vars.saveRod_drops.put(p.getName(), drops);
     e.getDrops().clear();
}