diff --git a/common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/DefaultLwM2MTransportMsgHandler.java b/common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/DefaultLwM2MTransportMsgHandler.java
index 9304a36e60..e286cc6570 100644
--- a/common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/DefaultLwM2MTransportMsgHandler.java
+++ b/common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/DefaultLwM2MTransportMsgHandler.java
@@ -274,8 +274,8 @@ public class DefaultLwM2MTransportMsgHandler implements LwM2mTransportMsgHandler
     private void removeClientCash(Registration registration) {
         SessionInfoProto sessionInfo = this.getSessionInfoOrCloseSession(registration);
         if (sessionInfo != null) {
-//            transportService.deregisterSession(sessionInfo);
-//            this.doCloseSession(sessionInfo);
+            transportService.deregisterSession(sessionInfo);
+            this.doCloseSession(sessionInfo);
             sessionStore.remove(registration.getEndpoint());
 
             clientContext.removeClientByRegistrationId(registration.getId());
@@ -1283,7 +1283,7 @@ public class DefaultLwM2MTransportMsgHandler implements LwM2mTransportMsgHandler
         if (lwM2MClient != null) {
             SessionInfoProto sessionInfoProto = lwM2MClient.getSession();
             if (sessionInfoProto == null) {
-                log.info("[{}] [{}]", lwM2MClient.getEndpoint(), CLIENT_NOT_AUTHORIZED);
+                log.trace("[{}] [{}]", lwM2MClient.getEndpoint(), CLIENT_NOT_AUTHORIZED);
                 this.removeClientCash(lwM2MClient.getRegistration());
             }
             return sessionInfoProto;
@@ -1322,7 +1322,11 @@ public class DefaultLwM2MTransportMsgHandler implements LwM2mTransportMsgHandler
     }
 
     private void reportActivity() {
-        clientContext.getLwM2mClients().forEach(client -> reportActivityAndRegister(client.getSession()));
+        clientContext.getLwM2mClients().forEach(client -> {
+                    log.warn("0_01) reportActivity clientEndpoint: [{}] session: [{}]", client.getEndpoint(), client.getSession());
+                    reportActivityAndRegister(client.getSession());
+                }
+        );
     }
 
     /**
diff --git a/common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/LwM2mTransportCoapResource.java b/common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/LwM2mTransportCoapResource.java
index 7ba491d6d1..b185d18a28 100644
--- a/common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/LwM2mTransportCoapResource.java
+++ b/common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/LwM2mTransportCoapResource.java
@@ -135,11 +135,12 @@ public class LwM2mTransportCoapResource extends AbstractLwM2mTransportResource {
             int chunk = 0;
             Response response = new Response(CoAP.ResponseCode.CONTENT);
             byte[] fwData = this.getOtaData(currentId);
+            log.warn("91) read softWare data (length): [{}]", fwData.length);
             if (fwData != null && fwData.length > 0) {
                 response.setPayload(fwData);
                 boolean moreFlag = fwData.length > chunkSize;
                 response.getOptions().setBlock2(chunkSize, moreFlag, chunk);
-                log.warn("91) Send currentId: [{}], length: [{}], chunkSize [{}], moreFlag [{}]", currentId.toString(), fwData.length, chunkSize, moreFlag);
+                log.warn("92) Send currentId: [{}], length: [{}], chunkSize [{}], moreFlag [{}]", currentId.toString(), fwData.length, chunkSize, moreFlag);
                 exchange.respond(response);
             }
 
diff --git a/common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/client/LwM2mFwSwUpdate.java b/common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/client/LwM2mFwSwUpdate.java
index a4efc35cf4..f1728cdea6 100644
--- a/common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/client/LwM2mFwSwUpdate.java
+++ b/common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/client/LwM2mFwSwUpdate.java
@@ -196,6 +196,7 @@ public class LwM2mFwSwUpdate {
                 String api = handler.config.getHostRequests();
                 int port = registration.getIdentity().isSecure() ? handler.config.getSecurePort() : handler.config.getPort();
                 String uri = "coap://" + api + ":" + Integer.valueOf(port) + "/" + OTA_COAP_RESOURCE + "/" + this.currentId.toString();
+                log.warn("89) coapUri: [{}]", uri);
                 request.sendAllRequest(this.lwM2MClient.getRegistration(), targetIdVer, WRITE_REPLACE, null,
                         uri, handler.config.getTimeout(), this.rpcRequest);
             } else if (LwM2mTransportUtil.LwM2MFirmwareUpdateStrategy.OBJ_19_BINARY.code == this.updateStrategy) {