From a8867dce1dbceb7d2a1fa27ea2724e62a296632a Mon Sep 17 00:00:00 2001
From: taratorio <94537774+taratorio@users.noreply.github.com>
Date: Fri, 23 Jan 2026 14:56:31 +1100
Subject: [PATCH 1/3] execution: parallel exec flow was missing
 BlockPostExecutionValidator.Wait()

---
 execution/stagedsync/exec3_parallel.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/execution/stagedsync/exec3_parallel.go b/execution/stagedsync/exec3_parallel.go
index 733c37977d2..ca1b2505ee3 100644
--- a/execution/stagedsync/exec3_parallel.go
+++ b/execution/stagedsync/exec3_parallel.go
@@ -348,6 +348,11 @@ func (pe *parallelExecutor) exec(ctx context.Context, execStage *StageState, u U
 							}
 							resetCommitmentGauges(ctx)
 
+							err = pe.getPostValidator().Wait()
+							if err != nil {
+								return err
+							}
+
 							if shouldGenerateChangesets {
 								pe.domains().SavePastChangesetAccumulator(applyResult.BlockHash, applyResult.BlockNum, changeSet)
 							}

From ceed800b3f0a849b98e87583a87d1647173d3677 Mon Sep 17 00:00:00 2001
From: taratorio <94537774+taratorio@users.noreply.github.com>
Date: Fri, 23 Jan 2026 15:04:07 +1100
Subject: [PATCH 2/3] execution: parallel exec flow was missing
 BlockPostExecutionValidator.Wait()

---
 execution/stagedsync/exec3_parallel.go | 1 +
 1 file changed, 1 insertion(+)

diff --git a/execution/stagedsync/exec3_parallel.go b/execution/stagedsync/exec3_parallel.go
index ca1b2505ee3..6c21ec834a8 100644
--- a/execution/stagedsync/exec3_parallel.go
+++ b/execution/stagedsync/exec3_parallel.go
@@ -348,6 +348,7 @@ func (pe *parallelExecutor) exec(ctx context.Context, execStage *StageState, u U
 							}
 							resetCommitmentGauges(ctx)
 
+							// we run receipt root verification in parallel alongside commitment computation
 							err = pe.getPostValidator().Wait()
 							if err != nil {
 								return err

From 3d38c7a480a849bf2d603f58bc713623484de3e3 Mon Sep 17 00:00:00 2001
From: taratorio <94537774+taratorio@users.noreply.github.com>
Date: Fri, 23 Jan 2026 15:06:53 +1100
Subject: [PATCH 3/3] execution: parallel exec flow was missing
 BlockPostExecutionValidator.Wait()

---
 execution/stagedsync/exec3_parallel.go | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/execution/stagedsync/exec3_parallel.go b/execution/stagedsync/exec3_parallel.go
index 6c21ec834a8..56e09c1b948 100644
--- a/execution/stagedsync/exec3_parallel.go
+++ b/execution/stagedsync/exec3_parallel.go
@@ -348,7 +348,8 @@ func (pe *parallelExecutor) exec(ctx context.Context, execStage *StageState, u U
 							}
 							resetCommitmentGauges(ctx)
 
-							// we run receipt root verification in parallel alongside commitment computation
+							// on chain tip we run receipt root verification in parallel alongside commitment computation
+							// make sure to wait for it to finish and check for an error
 							err = pe.getPostValidator().Wait()
 							if err != nil {
 								return err