Ui-form misbehaving all of a sudden

Dashboard
1

Dear lovely, helpful people,

I have a ui-form in my flow that used to work fine.
It consists of 5 input fields, 3 text, 2 number, an "add" and a "cancel" button.

These options are dynamically set via a function node in front of the form node.
That's because I have a language toggle and the function node gets triggered when the language changes.

Here's the code of this function node:

const lang = global.get("language") || "de";

// Unsere Übersetzungen für die Eingabefelder
const dict = {
    de: {
        nameLabel: "Name (z.B. Bonn - Home)",
        idLabel: "ID (z.B. bonn_home)",
        latLabel: "Breitengrad",
        lonLabel: "Längengrad",
        tzLabel: "Zeitzone (z.B. Europe/Berlin)"
    },
    en: {
        nameLabel: "Name (e.g. Bonn - Home)",
        idLabel: "ID (e.g. bonn_home)",
        latLabel: "Latitude",
        lonLabel: "Longitude",
        tzLabel: "Timezone (e.g. Europe/Berlin)"
    }
};

const t = dict[lang];


msg.ui_update = {
    // Die Optionen überschreiben die konfigurierten Felder
    options: [
        { value: "name", label: t.nameLabel, type: "text", required: true },
        { value: "id", label: t.idLabel, type: "text", required: true },
        { value: "lat", label: t.latLabel, type: "number", required: true },
        { value: "lon", label: t.lonLabel, type: "number", required: true },
        { value: "timezone", label: t.tzLabel, type: "text", required: true }
    ]
};

// Button-Beschriftungen können leider nicht dynamisch geändert werden!
// Siehe Doku hier: https://dashboard.flowfuse.com/nodes/widgets/ui-form$0

return msg;

So, you see: all the values are different. And: this used to work.

The form node's settings are like this:

SCR-20260322-ualk
SCR-20260322-ualk1408×1604 161 KB

This is the output of a debug node that sits directly at the output of the function node:

SCR-20260322-uhtv
SCR-20260322-uhtv802×1466 103 KB

So the options sent to the chart node look correct to me.

Now watch how this form is behaving (I hope animated GIFs work here? Because .mp4 is not allowed):

Screen Recording 2026-03-22 at 23.11.24

What I did to try & solve this

I completely removed this ui-form node and put a blank new one in – to no avail. Same thing.
I entered the 5 elements inside the ui-form node manually and disconnected the function node. Same.
I tried another browser (Chrome; I normally use Safari on macOS/iOS) – same.
I rebooted my Node-Red LXC Container that runs on my Proxmox VE machine – same.

It behaved totally normal a few days earlier. I don't know what changed.

Has anybody ever seen this behaviour, too? Maybe it's a known bug? :flushed_face:
Any help much appreciated. :folded_hands:

Cheers,
Stefan.

2

Hi Stefan. I had something similar with that form - suddenly it stopped populating when fed data from a table. Working with Gemini, there was apparently a change that causes this. In my case I needed a delay between showing the form with one ui_update and sending dropdown data in another. Try adding a 100ms delay between your function and the ui-form and/or separating show and data into two flows with a delay.