The text in the chatbox changes after switching panels

[xhzkp]

Bug Description

Watching the video makes it easier to understand what happened.

BUG3.mp4

workflow code:

{
  "nodes": [
    {
      "parameters": {},
      "id": "34b64747-2660-425f-9e6c-b0e2711105b6",
      "name": "Window Buffer Memory",
      "type": "@n8n/n8n-nodes-langchain.memoryBufferWindow",
      "typeVersion": 1.2,
      "position": [
        0,
        160
      ]
    },
    {
      "parameters": {
        "promptType": "define",
        "text": "=chatInput: {{ $json.chatInput }}\nsessionId: {{ $json.sessionId }}",
        "options": {
          "systemMessage": "You are a helpful assistant"
        }
      },
      "id": "dcfe6993-6dd4-45ec-8c76-f9175bf401fd",
      "name": "AI Agent",
      "type": "@n8n/n8n-nodes-langchain.agent",
      "typeVersion": 1.6,
      "position": [
        20,
        -100
      ]
    },
    {
      "parameters": {
        "options": {
          "baseURL": "https://oneapi.6868ai.com/v1"
        }
      },
      "type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
      "typeVersion": 1,
      "position": [
        -180,
        160
      ],
      "id": "e5743849-084a-4880-b09a-98bc4e14aef7",
      "name": "OpenAI Chat Model",
      "credentials": {
        "openAiApi": {
          "id": "p7mW3eJvUccvdSiC",
          "name": "OpenAi account"
        }
      }
    },
    {
      "parameters": {
        "public": true,
        "options": {}
      },
      "type": "@n8n/n8n-nodes-langchain.chatTrigger",
      "typeVersion": 1.1,
      "position": [
        -260,
        -100
      ],
      "id": "0dcc1f30-5bb9-47ec-a95e-c49351587ed4",
      "name": "When chat message received",
      "webhookId": "093f9196-1af3-4b19-b92d-b730bd8a83a9"
    }
  ],
  "connections": {
    "Window Buffer Memory": {
      "ai_memory": [
        [
          {
            "node": "AI Agent",
            "type": "ai_memory",
            "index": 0
          }
        ]
      ]
    },
    "OpenAI Chat Model": {
      "ai_languageModel": [
        [
          {
            "node": "AI Agent",
            "type": "ai_languageModel",
            "index": 0
          }
        ]
      ]
    },
    "When chat message received": {
      "main": [
        [
          {
            "node": "AI Agent",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  },
  "pinData": {}
}

To Reproduce

1. copy workflow code
2. run

Expected behavior

Keep the original message text.

Operating System

n8n cloud

n8n Version

1.72.1

Node.js Version

18.16.0

Database

SQLite (default)

Execution mode

main (default)

[Joffcom]

Hey @xhzkp,

We have created an internal ticket to look into this which we will be tracking as "N8N-7973"

[OlegIvaniv]

Hi @xhzkp, this a peculiar behaviour but not necessarily a bug. It's happening because you're passing text to agent as: "=chatInput: {{ $json.chatInput }}\nsessionId: {{ $json.sessionId }} and have memory connected. After navigating to Executions tab, we unmount the chat component. After navigating back to the canvas, we remount it and re-render the messages from the memory buffer execution. And since the actual message that went into the buffer was chatInput: ... \n sessionId: ... that gets mapped as the user message you see in the chat

[xhzkp]

Hi @xhzkp, this a peculiar behaviour but not necessarily a bug. It's happening because you're passing text to agent as: "=chatInput: {{ $json.chatInput }}\nsessionId: {{ $json.sessionId }} and have memory connected. After navigating to Executions tab, we unmount the chat component. After navigating back to the canvas, we remount it and re-render the messages from the memory buffer execution. And since the actual message that went into the buffer was chatInput: ... \n sessionId: ... that gets mapped as the user message you see in the chat

I think this is a bug. This issue occurs whenever the Text field is custom text. Every time, I have to click the reset button and then click confirm again...