'operation_time_started' and 'operation_time_ended' rules ignored

We have a simple JSON profile that lets us power a Samsung QBT display off or on.  So far, so good.

I've added what I believe are the correct rules to turn the display on or off based on our operation times.  Unfortunately, these are ignored; the display never turns on or off from the schedule.

Is there anything special we have to do to use these rules when setting operation times?

Sample code:

{
"about": {
"app": "CCI Zoom Room Profile Maker",
"version": "v0.2.5",
"url": "https://controlconcepts.net/zoom/",
"created": "Tue, 12 Sep 2023 20:06:17 GMT"
},
"adapters": [
{
"model": "iTachIP2SL",
"ip": "x.x.x.x",
"ports": [
{
"id": "display",
"name": "E4320",
"settings": {
"baud_rate": "9600",
"flow_control": "FLOW_NONE",
"parity": "PARITY_NO"
},
"methods": [
{
"id": "powerOff",
"name": "Power Off Display",
"command": "\\xAA\\x11\\xFE\\x01\\x00\\x10",
"type": "action"
},
{
"id": "powerOn",
"name": "Power On Display",
"command": "\\xAA\\x11\\xFE\\x01\\x01\\x11",
"type": "action"
}
]
}
]
}
],
"styles": [
"display.icon=icon_tv",
"display.powerOff.icon=icon_power",
"display.powerOn.icon=icon_power"
],
"rules": {
"operation_time_started": [
"display.powerOn"
],
"operation_time_ended": [
"display.powerOff"
]
}
}