diff --git a/application/src/main/java/org/thingsboard/server/actors/device/DeviceActorMessageProcessor.java b/application/src/main/java/org/thingsboard/server/actors/device/DeviceActorMessageProcessor.java
index 3dca3417b4..77bf7c32fa 100644
--- a/application/src/main/java/org/thingsboard/server/actors/device/DeviceActorMessageProcessor.java
+++ b/application/src/main/java/org/thingsboard/server/actors/device/DeviceActorMessageProcessor.java
@@ -865,6 +865,8 @@ public class DeviceActorMessageProcessor extends AbstractContextAwareMsgProcesso
     }
 
     private void notifyTransportAboutClosedSessionMaxSessionsLimit(UUID sessionId, SessionInfoMetaData sessionMd) {
+        attributeSubscriptions.remove(sessionId);
+        rpcSubscriptions.remove(sessionId);
         notifyTransportAboutClosedSession(sessionId, sessionMd, TransportSessionCloseReason.MAX_CONCURRENT_SESSIONS_LIMIT_REACHED);
     }
 
diff --git a/application/src/main/java/org/thingsboard/server/service/rpc/DefaultTbRuleEngineRpcService.java b/application/src/main/java/org/thingsboard/server/service/rpc/DefaultTbRuleEngineRpcService.java
index debc1cb987..27a64dc443 100644
--- a/application/src/main/java/org/thingsboard/server/service/rpc/DefaultTbRuleEngineRpcService.java
+++ b/application/src/main/java/org/thingsboard/server/service/rpc/DefaultTbRuleEngineRpcService.java
@@ -115,8 +115,9 @@ public class DefaultTbRuleEngineRpcService implements TbRuleEngineDeviceRpcServi
         ToDeviceRpcRequest request = new ToDeviceRpcRequest(src.getRequestUUID(), src.getTenantId(), src.getDeviceId(),
                 src.isOneway(), src.getExpirationTime(), new ToDeviceRpcRequestBody(src.getMethod(), src.getBody()), src.isPersisted(), src.getRetries(), src.getAdditionalInfo());
         forwardRpcRequestToDeviceActor(request, response -> {
-            if (src.isRestApiCall()) {
-                sendRpcResponseToTbCore(src.getOriginServiceId(), response);
+            String originServiceId = src.getOriginServiceId();
+            if (src.isRestApiCall() && originServiceId != null) {
+                sendRpcResponseToTbCore(originServiceId, response);
             }
             consumer.accept(RuleEngineDeviceRpcResponse.builder()
                     .deviceId(src.getDeviceId())