added additional fix for handling text nodes of additional info

application/src/main/java/org/thingsboard/server/actors/device/DeviceActorMessageProcessor.java

@@ -270,10 +270,19 @@ public class DeviceActorMessageProcessor extends AbstractContextAwareMsgProcesso
         rpc.setExpirationTime(request.getExpirationTime());
         rpc.setRequest(JacksonUtil.valueToTree(request));
         rpc.setStatus(status);
-        rpc.setAdditionalInfo(JacksonUtil.toJsonNode(request.getAdditionalInfo()));
+        rpc.setAdditionalInfo(getAdditionalInfo(request));
         systemContext.getTbRpcService().save(tenantId, rpc);
     }
 
+    private JsonNode getAdditionalInfo(ToDeviceRpcRequest request) {
+        try {
+            return JacksonUtil.toJsonNode(request.getAdditionalInfo());
+        } catch (IllegalArgumentException e) {
+            log.debug("Failed to parse additional info [{}]", request.getAdditionalInfo());
+            return JacksonUtil.valueToTree(request.getAdditionalInfo());
+        }
+    }
+
     private ToDeviceRpcRequestMsg createToDeviceRpcRequestMsg(ToDeviceRpcRequest request) {
         ToDeviceRpcRequestBody body = request.getBody();
         return ToDeviceRpcRequestMsg.newBuilder()