Keenetic NDMS2 Router: The device tracker isn't at home, even though it's connected via LAN to another device on the Mesh network.

### The problem

The device tracker isn't at home, even though it's connected via LAN to another device on the Mesh network.

### What version of Home Assistant Core has the issue?

core-2026.9.1

### What was the last working version of Home Assistant Core?

_No response_

### What type of installation are you running?

Home Assistant OS

### Integration causing the issue

keenetic_ndms2

### Link to integration documentation on our website

https://www.home-assistant.io/integrations/keenetic_ndms2/

### Diagnostics information

In the Keenetic app, I see the device as `Online`, but in Home Assistant, its `device_tracker` shows the status `Not home`.

### Example YAML snippet

```yaml

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### Anything in the logs that might be useful for us?

```txt

```

### Additional information

_No response_

Start with the keenetic_ndms2 integration and its documentation at https://www.home-assistant.io/integrations/keenetic_ndms2/. Compare the Keenetic app's Online status with Home Assistant diagnostics for a device connected through the mesh LAN path, then trace how the integration determines device_tracker presence. Done means the affected device is reported as home when that connection is active.

Written by the indexing model from the issue text.