Entity Controller automation problem

Third party integrations
1

I am not sure what kind of debugging is possible for this:
I have an automation (if that is the right term) configured in YAML for the Entity Controller HACS add-on.
The problem is I added a second entity to be controlled, but it did not work - only the one entity turns on when triggered, not both: see YAML code below.
Specifically garage_lights turn on, but not garage_under_cabinet_light_switch.
Any way to figure out and fix the issue?

garage_activity_lights:
  friendly_name: "Garage Lights ON For Activity (Motion Detected or Any Garage Door Opens)"
  sensors:
    - binary_sensor.garage_motion_sensor_in_main_floor_landing_occupancy
    - binary_sensor.garage_motion_sensor_in_basement_stairwell_bottom_landing_occupancy
    - binary_sensor.garage_doors_open_status
  entities:
    - switch.garage_under_cabinet_light_switch
    - switch.garage_lights
  delay: 900 #900s = 15 minutes
2

Have you tried putting the two switches in a group?

3

Thanks … I considered it but haven’t tried it: will do so and report back!

4

OK, I made a light group and that indeed worked! Good…thanks!
Changed from “entities:” with two child lines, one for each light
…to just: “entity: light.garage_light_group”.

But I do find it disconcerting that having two entities did NOT work:
is there an explanation for why two entities would not work?