Time triggered automation stopped working

I am using this automation for months without any problem. Suddenly, maybe related to one of the last Home Assistant updates, it stopped working. As of today I am using version 0.83.1.

- id: Fussbodenheizung_Bad_einschalten
  alias: Fussbodenheizung_Bad_einschalten
  initial_state: 'on'
  trigger:
  - platform: time
    at: '06:00:00'
  - platform: time
    at: '18:00:00'
  condition:
  - condition: state
    entity_id: group.anwesenheit_alle
    state: 'on'
  - condition: state
    entity_id: input_boolean.heizperiode
    state: 'on'
  - condition: state
    entity_id: input_boolean.urlaub
    state: 'off'    
  action:
  - entity_id: switch.badezimmer_fussbodenheizung
    service: switch.turn_on

If I trigger the Automation manually in the UI it is working and the switch is turned on, so I think the problem is related to the time trigger. How can I find out the cause?

Thanks for your help!

Is your system time correct?

I get

2018-11-30 10:07:43.027063+01:10

when testing it with {{now()}} which seems to be correct :slight_smile:

oh I just recognized that the time trigger is working in another automation:

- id: Fussbodenheizung_Bad_ausschalten
  alias: Fussbodenheizung_Bad_ausschalten
  initial_state: 'on'
  trigger:
  - platform: time
    at: '09:00:00'
  - platform: time
    at: '22:00:00'
  condition:
  - condition: state
    entity_id: switch.badezimmer_fussbodenheizung
    state: 'on'
  action:
  - entity_id: switch.badezimmer_fussbodenheizung
    service: switch.turn_off

hm now I am totally confused… why is the first automation not working, the second does work?