Missing attributes after update

Hi,

I’m using zigbee2mqtt 2.1.1 along with HA 2025.2.4. I noticed on the 2025.2.4 update that all of my MQTT entities from z2m are no longer providing the last_seen state and are not passing through elapsed either.

Below is an example of the state from zigbee2mqtt of one of my bulbs, which contains the last_seen attribute. I see this full payload being received into HA via MQTT

{
    "brightness": 254,
    "color_mode": "color_temp",
    "color_temp": 274,
    "last_seen": "2025-02-17T09:03:24.672Z",
    "level_config": {
        "on_level": "previous"
    },
    "linkquality": 42,
    "state": "ON",
    "update": {
        "installed_version": 587814449,
        "latest_version": 587814449,
        "state": "idle"
    },
    "update_available": false,
    "color_options": null,
    "effect": null,
    "identify": null,
    "power_on_behavior": null
}

However, when viewing the entity in ‘Developer tools’ I can see that the last_seen attribute is no longer in the YAML for that entity

min_color_temp_kelvin: 2202
max_color_temp_kelvin: 4000
min_mireds: 250
max_mireds: 454
effect_list:
  - blink
  - breathe
  - okay
  - channel_change
  - finish_effect
  - stop_effect
supported_color_modes:
  - color_temp
effect: null
color_mode: color_temp
brightness: 255
color_temp_kelvin: 3649
color_temp: 274
hs_color:
  - 27.037
  - 41.629
rgb_color:
  - 255
  - 197
  - 149
xy_color:
  - 0.442
  - 0.371
friendly_name: light/office_oli_spot_1
supported_features: 44

This is causing me a bit of a headache as I use this attribute to determine is a device has gone offline or not along with device reporting. (I do not use the ‘availability’ feature in z2m to reduce traffic)

Has anyone else seen this happen? I can confirm the last_seen configuration is enabled in z2m along with the elapsed flag set to ‘true’.

Short of setting the attribute manually via a python script, I’m not sure what else I could be doing.

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