Flow editor crash: TypeError: Cannot read property 'localeCompare' of undefined — iOS app + local web UI (firmware 13.2.0)

Questions & Help
1

After updating to firmware 13.2.0 (2026-05-21), the flow editor crashes on both the iOS app and the local web UI at `192.168.1.x`.

**Symptoms:**

- iOS Homey app: crash dialog when opening most flows, with stack trace pointing to `FlowEditorCardGroups` at `main.jsbundle:829148:30`

- Local web UI: most flows simply don’t appear in the list at all

- Flows continue executing correctly — this is display/editing only

**Error:** `TypeError: Cannot read property ‘localeCompare’ of undefined`

**Stack trace component:** `FlowEditorCardGroups`

**Steps to reproduce:** Open any flow in the iOS app or via http://[homey-ip] after updating to 13.2.0.

**What I’ve ruled out:** App offload + fresh reinstall from App Store didn’t help. Ran a full server-side audit — all flow card IDs exist in the registry, all titles are strings, all device/zone references are valid. The data is clean. This is a rendering-layer bug, not a data issue.

**Device:** Homey Pro (Early 2026), firmware 13.2.0, iOS app latest

2

Homey app bugs should be reported here: Support | Homey

3

Did you already PtP (unplug Homey for at least 10 minutes)?
This solved the weirdest issues after installed firmware updates.

The local web app version is quite old, v1.15.0; this (still) has not changed with firmware v13.2.0.

You’d best use my.homey.app instead, which runs v1.16.2, at least until the local web app version gets updated at some point.
Also please report your issues to homey.app/support like Robert alr stated.

my.homey.app web app changelog: