diff --git a/flow/connectors/postgres/cdc.go b/flow/connectors/postgres/cdc.go
index 84cc441d02..b59f5b6d39 100644
--- a/flow/connectors/postgres/cdc.go
+++ b/flow/connectors/postgres/cdc.go
@@ -248,7 +248,8 @@ func (p *PostgresCDCSource) consumeStream(
 			// that this is the last row committed on the destination.
 			if proposedConsumedXLogPos > consumedXLogPos {
 				p.logger.Info(fmt.Sprintf("Heartbeat adjusting lsn from %d to %d", consumedXLogPos, proposedConsumedXLogPos))
-				err := p.SetLastOffset(int64(proposedConsumedXLogPos))
+				consumedXLogPos = proposedConsumedXLogPos
+				err := p.SetLastOffset(int64(consumedXLogPos))
 				if err != nil {
 					return fmt.Errorf("[initial-flush] storing updated LSN failed: %w", err)
 				}
@@ -259,7 +260,6 @@ func (p *PostgresCDCSource) consumeStream(
 			if err != nil {
 				return fmt.Errorf("SendStandbyStatusUpdate failed: %w", err)
 			}
-			consumedXLogPos = proposedConsumedXLogPos
 			pkmRequiresResponse = false
 
 			if time.Since(standByLastLogged) > 10*time.Second {