123
February 15, 2026, 6:04pm
2
It’s a bug that will be fixed in the next release.
opened 06:23PM - 11 Feb 26 UTC
closed 07:51PM - 11 Feb 26 UTC
### Checklist
- [x] I have updated to the latest available Home Assistant versi… on.
- [x] I have cleared the cache of my browser.
- [x] I have tried a different browser to see if it is related to my browser.
- [x] I have tried reproducing the issue in [safe mode](https://www.home-assistant.io/blog/2023/11/01/release-202311/#restarting-into-safe-mode) to rule out problems with unsupported custom resources.
### Describe the issue you are experiencing
It was suggested that I opened this as an issue here, by an admin on the board. I have searched the board and it seems to have raised it's head in other users' automations at least a year or two back. Today all my motion sensing automations based on the motion activated light brightness stopped working. I see the same error in them all. I had to delete them all and recreated them to get them working again. This is the automation that runs on the blueprint:
```yaml
alias: Bevegelsesaktivert lys på soverom i andre oppe
description: ""
use_blueprint:
path: Aleks130699/motion_light_brightness.yaml
input:
motion_entity: binary_sensor.templatebevegelsessensor_pa_soverom_i_andre_oppe
on_night_time: "23:00:00"
off_night_time: "07:00:00"
day_brightness: 100
night_brightness: 20
light_target:
entity_id: light.dimmer_for_taklys_pa_soverom_i_andre
```
Here's the blueprint:
```yaml
blueprint:
name: Motion-activated Light-brightness
description: Turn the light on to brightness when motion is detected, depending
on the selected time period, different brightness and turn-on time.
domain: automation
input:
motion_entity:
name: Motion Sensor
selector:
entity:
domain:
- binary_sensor
device_class:
- motion
multiple: false
light_target:
name: Light
selector:
target:
entity:
- domain:
- light
on_night_time:
name: (Required) On Time Night
description: The time when the night mode starts.
selector:
time: {}
off_night_time:
name: (Required) Off Time Night
description: The time when the night mode ends.
selector:
time: {}
day_brightness:
name: Day brightness
description: Brightness, in daytime mode
default: 1
selector:
number:
min: 1.0
max: 100.0
step: 1.0
mode: slider
night_brightness:
name: Night brightness
description: Brightness, in night mode mode
default: 1
selector:
number:
min: 1.0
max: 100.0
step: 1.0
mode: slider
no_motion_wait_day:
name: Wait time day
description: Time to leave the light on after detecting the last movement for
daytime mode.
default: 120
selector:
number:
min: 0.0
max: 3600.0
unit_of_measurement: seconds
mode: slider
step: 1.0
no_motion_wait_night:
name: Wait time night
description: Time to leave the light on after detecting the last movement in
night mode
default: 120
selector:
number:
min: 0.0
max: 3600.0
unit_of_measurement: seconds
mode: slider
step: 1.0
source_url: https://gist.github.com/Aleks130699/5021baf8f4f1d63800d0f42842ba62b5
mode: restart
max_exceeded: silent
trigger:
platform: state
entity_id: !input motion_entity
from: 'off'
to: 'on'
action:
- choose:
- conditions:
- condition: time
after: !input on_night_time
before: !input off_night_time
sequence:
- alias: Turn on the light
service: light.turn_on
data:
brightness_pct: !input night_brightness
target: !input light_target
- alias: Wait until there is no motion from device
wait_for_trigger:
platform: state
entity_id: !input motion_entity
from: 'on'
to: 'off'
- alias: Wait the number of seconds that has been set
delay: !input no_motion_wait_night
- alias: Turn off the light
service: light.turn_off
target: !input light_target
default:
- alias: Turn on the light
service: light.turn_on
data:
brightness_pct: !input day_brightness
target: !input light_target
- alias: Wait until there is no motion from device
wait_for_trigger:
platform: state
entity_id: !input motion_entity
from: 'on'
to: 'off'
- alias: Wait the number of seconds that has been set
delay: !input no_motion_wait_day
- alias: Turn off the light
service: light.turn_off
target: !input light_target
```
The trigger is a template sensor, that allows the automation to be deactivated wit a boolean in other automations (activating and deactivating the automations themselfes has to many possible errors):
`{{ ('on' in states('input_boolean.bevegelsesstyrt_lys_pa_badet')) and ('on' in states('binary_sensor.alle_bevegelsessensorer_pa_badet')) }}`
The `binary_sensor.alle_bevegelsessensorer_pa_badet` is a sensor group with two physical Z-Wave motion sensors and one virtual sensor, a boolean that can be swithed by other automations to keep the light on in the controlled room.
Here's a screenshot of the trace, unfortunately after I recreated the automation, so it worked again, but the error message is there:
<img width="1729" height="953" alt="Image" src="https://github.com/user-attachments/assets/3433337f-d0e8-4c4c-bb5e-c20193671a32" />
So deleting and recreating the automations seems to fix that they are not workin, but I don't know for how long.
I am using the exact same blueprint at another location, and there I get the message `Unknown trigger` in trace, but the automation works as they should. At that location I have version 2025.11.3, while the version in my house with the problem is 2026.2.1. So something seemed to have happened between those versions.
### Describe the behavior you expected
It should just keep on working.
### Steps to reproduce the issue
1. The steps are in the description.
2.
3.
...
### What version of Home Assistant Core has the issue?
2026.2.1
### What was the last working version of Home Assistant Core?
2025.11.3
### In which browser are you experiencing the issue?
_No response_
### Which operating system are you using to run this browser?
WIndows 10 Pro
### State of relevant entities
```txt
```
### Problem-relevant frontend configuration
```yaml
```
### JavaScript errors shown in your browser console/inspector
```txt
```
### Additional information
_No response_
If you want to eliminate the error message now, simply update your automation’s syntax.
trigger → triggerscondition → conditionsaction → actions
platform → triggerservice → action
- id: 'driveway_person_presence'
alias: Driveway person Presence
description: Turns on driveway light when persons are detected in the driveway.
triggers:
- id: person_entered_zone
trigger: state
entity_id: binary_sensor.driveway_zone_person_occupancy
from: "off"
to: "on"
conditions:
- condition: sun
after: sunset
before: sunrise
actions:
- action: light.turn_on
target:
entity_id: light.driveway_light_light
mode: single