diff --git a/control_plane/attachment_service/src/service.rs b/control_plane/attachment_service/src/service.rs
index 8a80d0c746..14cf3c8a56 100644
--- a/control_plane/attachment_service/src/service.rs
+++ b/control_plane/attachment_service/src/service.rs
@@ -1273,6 +1273,7 @@ impl Service {
                     }
                 }
 
+                shard.config = req.config.tenant_conf.clone();
                 shard.schedule(scheduler)?;
 
                 let maybe_waiter = shard.maybe_reconcile(
diff --git a/control_plane/attachment_service/src/tenant_state.rs b/control_plane/attachment_service/src/tenant_state.rs
index 02f0171c29..a09a077aaa 100644
--- a/control_plane/attachment_service/src/tenant_state.rs
+++ b/control_plane/attachment_service/src/tenant_state.rs
@@ -615,6 +615,10 @@ impl TenantState {
             return None;
         };
 
+        // Advance the sequence before spawning a reconciler, so that sequence waiters
+        // can distinguish between before+after the reconcile completes.
+        self.sequence = self.sequence.next();
+
         let reconciler_cancel = cancel.child_token();
         let mut reconciler = Reconciler {
             tenant_shard_id: self.tenant_shard_id,