diff --git a/core/capabilities/don_notifier.go b/core/capabilities/don_notifier.go
index c40bea80e01..407a96c8862 100644
--- a/core/capabilities/don_notifier.go
+++ b/core/capabilities/don_notifier.go
@@ -74,8 +74,12 @@ func (n *donNotifier) Subscribe(ctx context.Context) (<-chan capabilities.DON, f
 
 	n.subscribers.Store(s, struct{}{})
 
-	if n.don.Load() != nil {
-		s <- *n.don.Load()
+	if d := n.don.Load(); d != nil {
+		select {
+		case s <- *d:
+		default:
+			// Channel already has a value from a concurrent NotifyDonSet.
+		}
 	}
 
 	return s, unsubscribe, nil