diff --git a/src/etcp.c b/src/etcp.c
index 92c0a47a..4bab999e 100644
--- a/src/etcp.c
+++ b/src/etcp.c
@@ -375,7 +375,10 @@ void etcp_conn_reset(struct ETCP_CONN* etcp) {
     etcp->last_rr_link = NULL;
 
     // Return unconfirmed inflight data to normalizer input (до нормалайзера)
-    if (etcp->normalizer) etcp_return_inflight_to_normalizer(etcp);
+    if (etcp->normalizer) {
+        etcp->normalizer->input->callback_suspended = 1;
+        etcp_return_inflight_to_normalizer(etcp);
+    }
 
     // Clear queues (keep queue structures)
     clear_queue(etcp->input_queue);