diff --git a/packages/transport/src/transports/abstractApi.ts b/packages/transport/src/transports/abstractApi.ts
index cd6ab89600..6c2f4b85b8 100644
--- a/packages/transport/src/transports/abstractApi.ts
+++ b/packages/transport/src/transports/abstractApi.ts
@@ -370,7 +370,9 @@ export abstract class AbstractApiTransport extends AbstractTransport {
                         signal,
                         logger: this.logger,
                     });
-                    thpState?.sync('send', name);
+                    if (thpState && !thpState.isPiggybackAckEnabled) {
+                        thpState.sync('send', name);
+                    }
                 } else {
                     sendResult = await sendChunks(chunks, apiWrite);
                 }
diff --git a/packages/transport/src/transports/bridge.ts b/packages/transport/src/transports/bridge.ts
index 0e3dbf7f49..5202488ea7 100644
--- a/packages/transport/src/transports/bridge.ts
+++ b/packages/transport/src/transports/bridge.ts
@@ -299,8 +299,8 @@ export class BridgeTransport extends AbstractTransport {
                 if (!response.success) {
                     return response;
                 }
-                if (protocol.name === 'v2') {
-                    thpState?.sync('send', name);
+                if (protocol.name === 'v2' && thpState && !thpState.isPiggybackAckEnabled) {
+                    thpState.sync('send', name);
                 }
 
                 return this.success(undefined);