fix: reconnection to FB logic

Author: LeoPatOZ

src/robust_provider/subscription.rs

@@ -83,14 +83,6 @@ impl<N: Network> RobustSubscription<N> {
                             "Subscription timeout - no block received, switching provider"
                         );
 
-                        // If we're on a fallback, force reconnect to primary
-                        // before switching to the next fallback (bypassing reconnect interval)
-                        if self.current_fallback_index.is_some() &&
-                            self.try_reconnect_to_primary(true).await
-                        {
-                            continue;
-                        }
-
                         self.switch_to_fallback(elapsed_err.into()).await?;
                     }
                 }
@@ -169,6 +161,11 @@ impl<N: Network> RobustSubscription<N> {
     }
 
     async fn switch_to_fallback(&mut self, last_error: Error) -> Result<(), Error> {
+        // If we're on a fallback, try primary first before moving to next fallback
+        if self.current_fallback_index.is_some() && self.try_reconnect_to_primary(true).await {
+            return Ok(());
+        }
+
         if self.last_reconnect_attempt.is_none() {
             self.last_reconnect_attempt = Some(Instant::now());
         }