don't attempt to teleport dead entities

paper-server/patches/sources/net/minecraft/world/entity/Entity.java.patch

@@ -398,7 +398,7 @@
 +    // CraftBukkit start
 +    public void postTick() {
 +        // No clean way to break out of ticking once the entity has been copied to a new world, so instead we move the portalling later in the tick cycle
-+        if (!(this instanceof ServerPlayer)) {
++        if (!(this instanceof ServerPlayer) && this.isAlive()) { // Paper - don't attempt to teleport dead entities
 +            this.handlePortal();
 +        }
 +    }