diff --git a/crates/chain-orchestrator/src/status.rs b/crates/chain-orchestrator/src/status.rs
index 26351f21..128e7c59 100644
--- a/crates/chain-orchestrator/src/status.rs
+++ b/crates/chain-orchestrator/src/status.rs
@@ -11,6 +11,13 @@ pub struct ChainOrchestratorStatus {
     pub l2: L2ChainStatus,
 }
 
+impl ChainOrchestratorStatus {
+    /// Returns true if the chain orchestrator is fully synced.
+    pub const fn is_synced(&self) -> bool {
+        self.l1.status.is_synced() && self.l2.status.is_synced()
+    }
+}
+
 impl ChainOrchestratorStatus {
     /// Creates a new [`ChainOrchestratorStatus`] from the given sync state, latest L1 block number,
     pub fn new(
diff --git a/crates/node/src/add_ons/remote_block_source.rs b/crates/node/src/add_ons/remote_block_source.rs
index 876c974f..595beb1e 100644
--- a/crates/node/src/add_ons/remote_block_source.rs
+++ b/crates/node/src/add_ons/remote_block_source.rs
@@ -195,6 +195,11 @@ where
                 continue;
             }
 
+            if !self.orchestrator_handle.status().await?.is_synced() {
+                tracing::debug!(target: "scroll::remote_source", "Imported block is valid, but orchestrator is not synced, skipping build");
+                continue;
+            }
+
             // Trigger block building on top of the imported block
             self.orchestrator_handle.build_block();