Do not deliver an action if the target relay is dead

packages/core/src/runtime/actor.ts

@@ -590,7 +590,7 @@ export class Turn {
             throw new Error("Attempt to reuse a committed Turn");
         }
         const a: StructuredTask<TaskAction> = {
-            perform() { Turn.active._inFacet(relay, a0); },
+            perform() { relay.isLive && Turn.active._inFacet(relay, a0); },
             describe() { return { targetFacet: relay, action: detail() }; },
         };
         this.queues.get(relay.actor)?.push(a) ?? this.queues.set(relay.actor, [a]);