diff --git a/premium/core/event_bus.py b/premium/core/event_bus.py
index 0f3bf7a..173b8c2 100644
--- a/premium/core/event_bus.py
+++ b/premium/core/event_bus.py
@@ -167,6 +167,16 @@ class Subscription:
     priority: EventPriority
     once: bool
     
+    def __hash__(self) -> int:
+        """Make subscription hashable (use id only)."""
+        return hash(self.id)
+    
+    def __eq__(self, other) -> bool:
+        """Compare subscriptions by id."""
+        if not isinstance(other, Subscription):
+            return False
+        return self.id == other.id
+    
     def matches(self, event: Event) -> bool:
         """Check if this subscription matches an event."""
         if self.event_types and event.type not in self.event_types:
@@ -403,9 +413,14 @@ class EventBus:
         self._queue.append(event)
         self._event_count += 1
         
-        # Process immediately in async context
-        if asyncio.get_event_loop().is_running():
-            asyncio.create_task(self._process_event(event))
+        # Process immediately in async context (thread-safe)
+        try:
+            loop = asyncio.get_running_loop()
+            if loop.is_running():
+                asyncio.create_task(self._process_event(event))
+        except RuntimeError:
+            # No event loop running in this thread - queue for later processing
+            pass
         
         return event