ui-dropdown - topic is lost when using Accept Client Data

[adamf-datapath]

Current Behavior

When Accept Client Data is enabled for ui-dropdown, the topic passed into the dropdown node is lost when a value is selected.

Expected Behavior

The output message from ui-dropdown node retains the topic passed into the node.

Steps To Reproduce

1. Set the topic going into the ui-dropdown node.
2. Open the dashboard and select a value.
3. Observe the output message - the topic is lost.

See reproduction:

[
    {
        "id": "35a00fcc21bff589",
        "type": "tab",
        "label": "Flow 1",
        "disabled": false,
        "info": "",
        "env": []
    },
    {
        "id": "2aa91d68bd7d2cf7",
        "type": "ui-dropdown",
        "z": "35a00fcc21bff589",
        "group": "e5ee6bb9bf33fc5f",
        "name": "",
        "label": "Select Option:",
        "tooltip": "",
        "order": 1,
        "width": 0,
        "height": 0,
        "passthru": false,
        "multiple": false,
        "options": [],
        "payload": "",
        "topic": "topic",
        "topicType": "msg",
        "className": "",
        "x": 960,
        "y": 200,
        "wires": [
            [
                "e0d608487ccd1149"
            ]
        ]
    },
    {
        "id": "e0d608487ccd1149",
        "type": "debug",
        "z": "35a00fcc21bff589",
        "name": "debug 3",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
        "complete": "true",
        "targetType": "full",
        "statusVal": "",
        "statusType": "auto",
        "x": 960,
        "y": 260,
        "wires": []
    },
    {
        "id": "9cd6c91afcdbfb2f",
        "type": "change",
        "z": "35a00fcc21bff589",
        "name": "",
        "rules": [
            {
                "t": "set",
                "p": "options",
                "pt": "msg",
                "to": "[{\"value\":1,\"label\":\"One\"},{\"value\":2,\"label\":\"Two\"}]",
                "tot": "json"
            },
            {
                "t": "set",
                "p": "topic",
                "pt": "msg",
                "to": "test-topic",
                "tot": "str"
            }
        ],
        "action": "",
        "property": "",
        "from": "",
        "to": "",
        "reg": false,
        "x": 720,
        "y": 200,
        "wires": [
            [
                "2aa91d68bd7d2cf7",
                "e0d608487ccd1149"
            ]
        ]
    },
    {
        "id": "5456420d981161db",
        "type": "ui-event",
        "z": "35a00fcc21bff589",
        "ui": "e578ecf151797c4b",
        "name": "",
        "x": 550,
        "y": 200,
        "wires": [
            [
                "9cd6c91afcdbfb2f"
            ]
        ]
    },
    {
        "id": "489a7c8d00a851bb",
        "type": "inject",
        "z": "35a00fcc21bff589",
        "name": "",
        "props": [
            {
                "p": "payload"
            },
            {
                "p": "topic",
                "vt": "str"
            }
        ],
        "repeat": "",
        "crontab": "",
        "once": true,
        "onceDelay": 0.1,
        "topic": "",
        "payload": "",
        "payloadType": "date",
        "x": 570,
        "y": 120,
        "wires": [
            [
                "2aa91d68bd7d2cf7"
            ]
        ]
    },
    {
        "id": "e5ee6bb9bf33fc5f",
        "type": "ui-group",
        "name": "Test",
        "page": "6722c437d7090ba4",
        "width": "6",
        "height": "1",
        "order": 1,
        "showTitle": true,
        "className": "",
        "visible": "true",
        "disabled": "false"
    },
    {
        "id": "e578ecf151797c4b",
        "type": "ui-base",
        "name": "My Dashboard",
        "path": "/dashboard",
        "includeClientData": true,
        "acceptsClientConfig": [
            "ui-notification",
            "ui-control",
            "ui-button",
            "ui-dropdown"
        ],
        "showPathInSidebar": false,
        "navigationStyle": "fixed",
        "titleBarStyle": "default"
    },
    {
        "id": "6722c437d7090ba4",
        "type": "ui-page",
        "name": "Test",
        "ui": "e578ecf151797c4b",
        "path": "/test",
        "icon": "home",
        "layout": "grid",
        "theme": "311d097b7376955f",
        "order": 1,
        "className": "",
        "visible": "true",
        "disabled": "false"
    },
    {
        "id": "311d097b7376955f",
        "type": "ui-theme",
        "name": "Default Theme",
        "colors": {
            "surface": "#ffffff",
            "primary": "#0094ce",
            "bgPage": "#eeeeee",
            "groupBg": "#ffffff",
            "groupOutline": "#cccccc"
        },
        "sizes": {
            "pagePadding": "12px",
            "groupGap": "12px",
            "groupBorderRadius": "4px",
            "widgetGap": "12px"
        }
    }
]

Environment

• Dashboard version: 1.12.0
• Node-RED version: 3.1.7
• Node.js version: 18.19.1
• npm version: 10.2.4
• Platform/OS: Windows
• Browser: Edge

Have you provided an initial effort estimate for this issue?

I am not a FlowFuse team member